Math Related : Calc4Chem / The JavaScript Source

General

This calculator can be used as a common scientific calculator (sin, cos, log, power, root, memory). However, it also includes a molecular weight calculator and the tables with various physical and chemical constants. The calculator contains a list with task history, storing all the recent inputs and results. Scientific calculator displays the numbers rounded to a user-specified number of decimal places. A very advanced calculator but easy to implement.

» Click for demo page «

Notes

Created by: Eni Generalic
Web Site: http://www.periodni.com/

Source Code

Paste this source code into the designated areas.

External file

Paste this code into an external JavaScript file named: calc4chem.js

/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Eni Generalic | http://www.periodni.com/ */

// Scientific Calculator written by Eni Generalic - http://www.periodni.com/
// Copyright © 2008 by EniG. If you use a variant of this in your page, please email me at eni.generalic@gmail.com
// Eni Generalic, Split, Create: 1999/10/14; Update: 2008/03/01
// Atomic Weights of the Elements 2005, Pure & Appl. Chem., Vol. 78, No. 11, (2006) 2051-2066).

var EniG = "  Calc4Chem - www.periodni.com";
var que = "";
var ans = 0;
var mem = 0;

var broj = "0";
var tocka = 0;
var eksp = 0;
var baza = "";
var eksponent = 3;
var rjesenje = 0;
var decimala = 14;
var asf = 0;
var rdg = 0;
var sep1000 = 0;
var enter = "";
var mr = "";
var pi = 3.141592653589793;
var e = 2.71828182845905;
var abc = "";

//window.onerror = handleError;

function start(){
	enter = "\r\n";
	mr = document.racunalo.memorija.value;
	document.racunalo.notes.value =  enter + EniG + enter;
	var dan = new Date();
	document.racunalo.notes.value += "    " + dan.toLocaleString() + enter + enter;
	document.racunalo.zadatak.focus();
}

function handleError() {
	//alert("YOU HAVE ENCOUNTERED A JAVASCRIPT ERROR");
	document.racunalo.notes.value += " = Syntax Error\r\n";
	document.racunalo.rezultat.value = "Syntax Error";
 	document.racunalo.zadatak.focus();
	return true;
}

function memory(operator) {

	switch(operator) {
	case 1:		// MS 
		memorija = document.racunalo.rezultat.value;
		memorija = memorija.replace(/ /g,'');
		document.racunalo.memorija.value = memorija;
		document.racunalo.MR.title = mr + " (" + memorija + ")";
		mem = parseFloat(memorija);
		stanje = (document.getElementById('nummem').style.color == '#000') ? '#ccc' : '#000';
		document.getElementById('nummem').style.color = stanje;
		break;    
	case 2:	// MR
		var memorija = document.racunalo.memorija.value;
		if (memorija==0 || slovo(memorija.charAt(0))) {memorija = ""}
		document.racunalo.zadatak.value += memorija;	
		break; 
	case 3:	// CLS
		if (document.racunalo.zadatak.value == "") {document.racunalo.rezultat.value = "";}
		else {document.racunalo.zadatak.value = "";	}	
		break; 
	case 4:	// Mode
		vidi('numformat');
		break; 
	case 5:	// Reset
		document.racunalo.notes.value = enter + EniG + enter;
		document.racunalo.memorija.value = "";
		document.racunalo.MR.title = mr;
		decimala = 14;
		asf = 0;
		rdg = 0;
		sep1000 = 0;
		mem = 0;
		ans = 0;
		document.getElementById('numauto').style.color = '#000';
		document.getElementById('numsci').style.color = '#ccc';
		document.getElementById('numfix').style.color = '#ccc';
		document.getElementById('nummem').style.color = '#ccc';
		document.getElementById('numrad').style.color = '#000';
		document.getElementById('numdeg').style.color = '#ccc';
		document.getElementById('numgrad').style.color = '#ccc';	
		break; 
	}

	document.racunalo.zadatak.focus();
}

function dodajBroj(noviznak) {
	document.racunalo.zadatak.focus();
	document.racunalo.zadatak.value += noviznak
}


function dodajConst(noviznak) {
	document.racunalo.zadatak.focus();
	document.racunalo.zadatak.value += noviznak;
	
	vidi('konstante')
}


function izracunaj(zarez) {
	var pitanje = "";
	var odgovor = "";
	var mem = 0;
	//onerror = handleError;
	
	if (zarez >= 1) {
		if (document.racunalo.zadatak.value == "") {
			broj = document.racunalo.rezultat.value;
		}
		else {
	    	broj = document.racunalo.zadatak.value;
			if (ubacirezultat(broj.charAt(0))) {
				broj = document.racunalo.rezultat.value + broj;
			}
		}
	}

	for (var i=0; i<broj.length; i++) {
		var mm = broj.charAt(i);
		var mmup = broj.charAt(i+1);
		var mmdn = broj.charAt(i-1);

		if (mm == ",") {mm = ".";}
		else if (mm == "}" || mm == "]") {mm = ")";}
		else if (mm == "{" || mm == "[") {mm = "(";}
		else if (mm == " " || mm == "=") {mm = "";}
		else if (mm == "*" && mmup == "*") {mm = "^"; i += 1;}
		else if (mm == "+" && mmup == "-") {mm = "-"; i += 1;}
		else if (mm == "E" && kemilimat(mmup)) {mm = "e";}
	
		if (mm == "." && BrojAtoma(mmdn)==false) {mm = "0.";}
		else if (velikoslovo(mm)) {var kem = 1;}

		if (pitanje == "0") {
			if (operator(mm)) {}
			else if (mm != ".") {pitanje = "";}
		}
		//if (i == 0) {
		//	if (mm == "0" && mmup == "0") {mm = "";}
		//}

		pitanje += mm;
	}

	if (zarez == 1) {
		document.racunalo.notes.value += pitanje;
		document.racunalo.upit.value = pitanje;
		if (kem == 1) {
			//var atom = "+" + pitanje;
			odgovor = masa(pitanje);
		}
		else {
			odgovor = zagrada(pitanje);
		}
	}
	else {
		odgovor = matematika(zarez, pitanje)
	}
	
	odgovor = odgovor.toString();
	document.racunalo.oldrezultat.value = odgovor;
	ans = parseFloat(odgovor);
	
	izgledbroja(odgovor);

	document.racunalo.zadatak.value = "";
 	document.racunalo.zadatak.focus();
}


function matematika(zarez, rjesenje) {
var pitanje = "";
 with (Math) {
	if (zarez == 2) {
		pitanje = rjesenje + "^2";
		rjesenje = pow(rjesenje, 2)
	}
	else if (zarez == 3) {
		pitanje = rjesenje + "^(1/2)";
		rjesenje = sqrt(rjesenje)
	}
	else if (zarez == 4) {
		pitanje = rjesenje + "*(-1)";
		rjesenje = -rjesenje
	}
	else if (zarez == 5) {
		pitanje = "ln(" + rjesenje + ")";
		rjesenje = log(rjesenje)
	}
	else if (zarez == 6) {
		pitanje = "e^" + rjesenje;
		rjesenje = pow(E, rjesenje)
	}
	else if (zarez == 7) {
		pitanje = "1/" + rjesenje;
		rjesenje = 1/rjesenje
	}
	else if (zarez == 8) {
		pitanje = "log(" + rjesenje + ")";
		rjesenje = log(rjesenje)/LN10
	}
	else if (zarez == 9) {
		pitanje = "10^" + rjesenje;
		rjesenje = pow(10, rjesenje)
	}
	else if (zarez >= 10 && zarez <= 12) {
		if (zarez == 10) {
			pitanje = "atan(" + rjesenje + ")";
			rjesenje = atan(rjesenje)
		}
		else if (zarez == 11) {
			pitanje = "acos(" + rjesenje + ")";
			rjesenje = acos(rjesenje)
		}
		else if (zarez == 12) {
			pitanje = "asin(" + rjesenje + ")";
			rjesenje = asin(rjesenje)
		}

		if (document.racunalo.stupnjevi[1].checked) {rjesenje = (rjesenje * 180) / PI}
		else if (document.racunalo.stupnjevi[2].checked) {rjesenje = (rjesenje * 200) / PI}
	}
	else if (zarez >= 14 && zarez <= 16) {
		if (document.racunalo.stupnjevi[1].checked)
			{radijani = (rjesenje / 180) * PI}
		else if (document.racunalo.stupnjevi[2].checked)
			{radijani = (rjesenje / 200) * PI}
		else
			{radijani = rjesenje}

		if (zarez == 14) {
			pitanje = "tan(" + rjesenje + ")";
			rjesenje = tan(radijani)
		}
		else if (zarez == 15) {
			pitanje = "cos(" + rjesenje + ")";
			rjesenje = cos(radijani)
		}
		else if (zarez == 16) {
			pitanje = "sin(" + rjesenje + ")";
			rjesenje = sin(radijani)
		}
	}
	else if (zarez == 17) {
		pitanje = rjesenje + "%";
		rjesenje = rjesenje/100
	}
	else if (zarez == 18) {
		pitanje = rjesenje + "ppm";
		rjesenje = rjesenje/1000000
	}
	else if (zarez == 20) {
		pitanje = rjesenje + "!";
		rjesenje = factorial(rjesenje)
	}
	else if (zarez == 21) {
		eksponent = prompt("Unesite eksponent / Please enter exponent", 3);
		pitanje = rjesenje + "^" + eksponent;
		rjesenje = pow(rjesenje, eksponent)
	}
	else if (zarez == 22) {
		eksponent = prompt("Unesite korijen / Please enter root", 3);
		document.racunalo.notes.value += rjesenje + "^(1/" + eksponent + ")";
		rjesenje = pow(rjesenje, (1/eksponent))
	}
 }
	document.racunalo.notes.value += pitanje;
	document.racunalo.upit.value = pitanje;
	return rjesenje;
}

function zagrada(xbroj) {
    var intZagClose = 0
    var intZagOpen = 0
	var intXbroj = 0
	var strNoviXbroj = ""
	var strNoviZbroj = "";

	do {
//document.racunalo.notes.value += enter + "intXbroj = " + intXbroj;			2+(2*(2+4)+3)^3+5
		xbroj = xbroj.replace(/--/g,"-1*-");
		intZagClose = xbroj.indexOf(")");
		if (intZagClose != -1) {
			for (var i = intZagClose; i >= 0; i--) {
				if (xbroj.charAt(i)=="(") {
					intZagOpen = i;
					strNoviZbroj = xbroj.substring(intZagOpen+1,intZagClose);
					break;
				}
			}
		}
		else {
			strNoviZbroj = xbroj;
		}

		strNoviZbroj = strNoviZbroj + "*1";
		strNoviZbroj = postotak(strNoviZbroj);
		strNoviZbroj = trigonometrija(strNoviZbroj);
		strNoviZbroj = logaritam(strNoviZbroj);
		strNoviZbroj = potencija(strNoviZbroj);
		strNoviZbroj = racun(strNoviZbroj);

		if (intZagClose != -1) {
			xbroj = xbroj.replace(xbroj.substring(intZagOpen, intZagClose+1), strNoviZbroj);
		}
		else {
			xbroj = strNoviZbroj;
		}	
	}
	while (intZagClose > 0)
	
	return xbroj;
}


function racun(zbroj) {
	with (Math) {zbroj = eval(zbroj);}
	return zbroj;
}


function potencija(ulaz) {
    var intZagClose = 0
    var intZagOpen = 0;

	var intXbroj = ulaz.indexOf("^");  //2+2^3+2,15^2+4
	
	while (intXbroj > 0) {
		for (var i = intXbroj - 1; i >= 0; i--) {
			if (operator(ulaz.charAt(i)) && ulaz.charAt(i-1)!="e") {
				//if (i > 0 && operator(ulaz.charAt(i-1))) {
				intZagOpen = i+1;
				break;
			}
		}
		
		if (ulaz.charAt(i) == "-"){
			if (i == 0) {intZagOpen = 0;}
			else if (i > 0 && operator(ulaz.charAt(i-1))) {intZagOpen = i;}
		}
		
		var strNoviXbroj = ulaz.substring(intZagOpen,intXbroj);
		
		for (var i = intXbroj + 2; i < ulaz.length; i++) {
			if (operator(ulaz.charAt(i)) && ulaz.charAt(i-1)!="e") {intZagClose = i-1; break}
		}
		var strNoviYbroj = ulaz.substring(intXbroj+1,intZagClose+1);
 if (strNoviXbroj == 'e') {strNoviXbroj = e}; //cps	
		with (Math) {
			intXbroj = pow(strNoviXbroj, strNoviYbroj);
		}
		//if (i != 0 && ulaz.charAt(i-1)) {}  // za negativne brojeve -3^2 = -9 ili 9
		
		ulaz = ulaz.replace(ulaz.substring(intZagOpen, intZagClose+1), intXbroj);

		intXbroj = ulaz.indexOf("^");
	}

	return ulaz;
}


function postotak(ulaz) {
    var intZagClose = 0;
    var intZagOpen = 0;

	var strDesnoFun = new Array ("!", "%");

	for (var f = 0; f < 2; f++) {
		var intXbroj = ulaz.indexOf(strDesnoFun[f]);
		
		while (intXbroj > 0) {
			for (var i = intXbroj - 1; i >= 0; i--) {
				if (operator(ulaz.charAt(i)) && ulaz.charAt(i-1)!="e") {intZagOpen = i+1; break}
			}
			var strNoviXbroj = ulaz.substring(intZagOpen,intXbroj);
			intZagClose = intXbroj+1;
			with (Math) {
				if (f == 0) {
					intXbroj = factorial(strNoviXbroj);
				}
				else {
					intXbroj = strNoviXbroj/100;
				}
			}
			ulaz = ulaz.replace(ulaz.substring(intZagOpen, intZagClose), intXbroj);
			intXbroj = ulaz.indexOf(strDesnoFun[f]);
		}
	}

	return ulaz;
}


function trigonometrija(kut) {
    var intZagClose = 0
	var intKut = 0
	var strNoviKut = ""
	var strKrozPi = ")"
	var strPiKroz = ")";
	
	switch(rdg) {
	case 1:
		strKrozPi = ")*180/pi";
		strPiKroz = "*pi/180)";
		break;    
	case 2:
		strKrozPi = ")*200/pi";
		strPiKroz = "*pi/200)";
		break;
	default:
		strKrozPi = ")";
		strPiKroz = ")";
	}

	var strTrigFun = new Array ("sin", "cos", "tan");

	for (var f = 0; f < 3; f++) {
		intKut = kut.indexOf(strTrigFun[f]);

		if (intKut >= 0) {
			do {
//document.racunalo.notes.value += enter + intKut + enter;			cos(2*(3+5)+3*(2+4))+1                        2+(2*(2+cos(4))+3)+(3^3+5)*4
				intZagClose = kut.length;
				for (var i = intKut+4; i < intZagClose; i++) {

					if (operator(kut.charAt(i)) && kut.charAt(i-1)!="e") {
						intZagClose = i;
						strNoviKut = kut.substring(intKut+3, intZagClose);
						break;
					}
				}

				if (intKut>0 && kut.charAt(intKut-1)=="a") {
					intKut = intKut - 1;
					strNoviKut = "a" + strTrigFun[f] + "(" + strNoviKut + strKrozPi;
				}
				else {
					strNoviKut = strTrigFun[f] + "(" + strNoviKut + strPiKroz;
				}

				strNoviKut = racun(strNoviKut);
				strNoviKut = Math.round(strNoviKut * Math.pow(10,14)) / Math.pow(10,14);
				
				kut = kut.replace(kut.substring(intKut, intZagClose), strNoviKut);
				
				intKut = kut.indexOf(strTrigFun[f]);

			}
			while (intKut != -1);
		}
	}

	return kut;
}


function logaritam(kut) {
    var intZagClose = 0
	var intKut = 0
	var strNoviKut = ""
	var strKrozPi = ")"
	var strPiKroz = ")";
// var e = 2.71828182845905	

	var strLogFun = new Array ("ln", "log");

	for (var f = 0; f < 2; f++) {
		intKut = kut.indexOf(strLogFun[f]);

		if (intKut >= 0) {
			do {
				intZagClose = kut.length;
				for (var i = intKut; i < intZagClose; i++) {

					if (operator(kut.charAt(i)) && kut.charAt(i-1)!="e") {
						intZagClose = i;
						strNoviKut = kut.substring(intKut+strLogFun[f].length, intZagClose);
						break;
					}
				}

				if (f == 0) {
					if (intKut>0 && kut.charAt(intKut-1)=="a") {
						intKut = intKut - 1;
						strNoviKut = "pow(E," + strNoviKut + ")";
					}
					else {
						strNoviKut = "log(" + strNoviKut + ")";
					}
				}
				else {
					if (intKut>0 && kut.charAt(intKut-1)=="a") {
						intKut = intKut - 1;
						strNoviKut = "pow(10," + strNoviKut + ")";
					}
					else {
						strNoviKut = "log(" + strNoviKut + ")/LN10";
					}
				}

				strNoviKut = racun(strNoviKut);

				kut = kut.replace(kut.substring(intKut, intZagClose), strNoviKut);
				intKut = kut.indexOf(strLogFun[f]);

			}
			while (intKut != -1);
		}
	}

	return kut;
}


function izazareza(novibroj) {
 with (Math) {

	if (eksp == -1) {
		var duzina = tocka;
		if (duzina == -1) {duzina = novibroj.length}
		var desni = "";

		if (duzina > 16) {
			var privremeni = round(novibroj*pow(10, 16)) + " ";
			var novie = privremeni.indexOf("e");
			var lijevi = (privremeni.substring(0,novie));

			lijevi = round(lijevi*pow(10, 15))/pow(10, 15) + " ";
			desni = (privremeni.substring(novie+2,privremeni.length-1));
			desni = "e+" + (desni-18);
		}
		else {
			var lijevi = round(novibroj*pow(10, decimala))/pow(10, decimala) + " ";
		}
	}
	else {
		var lijevi = novibroj.substring(0,eksp);
		var desni = novibroj.substring(eksp,novibroj.length);

		lijevi = round(lijevi*pow(10, decimala))/pow(10, decimala) + " ";
	}

	lijevi = lijevi.substring(0,lijevi.length - 1);

	if (lijevi.charAt(0) == ".") {lijevi = "0" + lijevi;}

	if (decimala < 14) {
		if (lijevi.indexOf(".") == -1 && decimala != 0) {lijevi += "."}
		var nula = (tocka + decimala) - (lijevi.length - 1);
		if (nula > 0 && decimala > 0) {
			for (var n = 0; n < nula; n++) {
				lijevi += "0";
			}
		}
	}

	return (lijevi + desni);
 }
}


function factorial(n) {
	if ((n == 0) || (n == 1)) {
		return 1;
	}
	else {
		var odgovor = (n * factorial(n-1));
		return odgovor;
	}
}


function masa(atom) {
 with (Math) {
 	var atominfo = false;
	var mm="";
	var mmdn="";
	var mmup="";
	var znak="";
	var izraz="";
	var Pi=pi;
	var H=1.0079;
	var He=4.0026;
	var Li=6.941;
	var Be=9.0122;
	var B=10.811;
	var C=12.011;
	var N=14.007;
	var O=15.999;
	var F=18.998;
	var Ne=20.18;
	var Na=22.99;
	var Mg=24.305;
	var Al=26.982;
	var Si=28.086;
	var P=30.974;
	var S=32.065;
	var Cl=35.453;
	var Ar=39.948;
	var K=39.098;
	var Ca=40.078;
	var Sc=44.956;
	var Ti=47.867;
	var V=50.942;
	var Cr=51.996;
	var Mn=54.938;
	var Fe=55.845;
	var Co=58.933;
	var Ni=58.693;
	var Cu=63.546;
	var Zn=65.409;
	var Ga=69.723;
	var Ge=72.64;
	var As=74.922;
	var Se=78.96;
	var Br=79.904;
	var Kr=83.798;
	var Rb=85.468;
	var Sr=87.62;
	var Y=88.906;
	var Zr=91.224;
	var Nb=92.906;
	var Mo=95.94;
	var Tc=98;
	var Ru=101.07;
	var Rh=102.91;
	var Pd=106.42;
	var Ag=107.87;
	var Cd=112.41;
	var In=114.82;
	var Sn=118.71;
	var Sb=121.76;
	var Te=127.6;
	var I=126.9;
	var Xe=131.29;
	var Cs=132.91;
	var Ba=137.33;
	var La=138.91;
	var Ce=140.12;
	var Pr=140.91;
	var Nd=144.24;
	var Pm=145;
	var Sm=150.36;
	var Eu=151.96;
	var Gd=157.25;
	var Tb=158.93;
	var Dy=162.5;
	var Ho=164.93;
	var Er=167.26;
	var Tm=168.93;
	var Yb=173.04;
	var Lu=174.97;
	var Hf=178.49;
	var Ta=180.95;
	var W=183.84;
	var Re=186.21;
	var Os=190.23;
	var Ir=192.22;
	var Pt=195.08;
	var Au=196.97;
	var Hg=200.59;
	var Tl=204.38;
	var Pb=207.2;
	var Bi=208.98;
	var Po=209;
	var At=210;
	var Rn=222;
	var Fr=223;
	var Ra=226;
	var Ac=227;
	var Th=232.04;
	var Pa=231.04;
	var U=238.03;
	var Np=237;
	var Pu=244;
	var Am=243;
	var Cm=247;
	var Bk=247;
	var Cf=251;
	var Es=252;
	var Fm=257;
	var Md=258;
	var No=259;
	var Lr=262;
	var Rf=267;
	var Db=268;
	var Sg=271;
	var Bh=272;
	var Hs=277;
	var Mt=276;
	var Ds=281;
	var Rg=280;
	
	for (var i=0; i<atom.length; i++) {
		mm = atom.charAt(i);
		mmup = atom.charAt(i+1);
		bigup = mm.toUpperCase();
		mmdn = atom.charAt(i-1);

		if (mm == "[") {mm = "("}
		else if (mm == "]") {mm = ")"}
		else if (mm == ",") {mm = "."}

		if (slovo(mm)) {atominfo = true}
		if (matoperator(mm)) {atominfo = false; znak=""}
		if (atominfo) {
			if (matoperator(mmup)) {znak=")"}
			if (matoperator(mmdn)) {izraz += "(" + mm + znak}
			else if (mmdn=="(") {izraz += mm + znak}
			else if (mmdn=="[") {izraz += mm + znak}
			else if (slovo(mm)) {izraz += "+" + mm + znak}
			else if (BrojAtoma(mmdn)) {izraz += mm + znak}
			else if (BrojAtoma(mm)) {izraz += "*" + mm + znak}
			else {izraz += mm + znak}
		}
		else {izraz += mm}
	}
	odgovor = eval(izraz);
	return odgovor;
 }
}


function slovo(znak) {
	var slovo="(ABCDEFGHIKLMNOPRSTUVWXYZ";
	for (var i=0; i<slovo.length; i++)
		if (znak == slovo.charAt(i)) {return true} {return false}
}

function velikoslovo(znak) {
	var slovo="ABCDEFGHIKLMNOPRSTUVWXYZ";
	for (var i=0; i<slovo.length; i++)
		if (znak == slovo.charAt(i)) {return true} {return false}
}

function maloslovo(znak) {
	var slovo="abcdefghiklmnoprstuvwxyz";
	for (var i=0; i<slovo.length; i++)
		if (znak == slovo.charAt(i)) {return true} {return false}
}

function matoperator(znak) {
	var matoperator="*/+-";
	for (var i=0; i<matoperator.length; i++)
		if (znak == matoperator.charAt(i)) {return true}
		if (znak == "") {return true}
		if (znak == null) {return true}
	return false
}

function operator(znak) {
	var matoperator="^*/+-";
	if (matoperator.indexOf(znak) >= 0) {return true} {return false}
}

function ubacirezultat(znak) {
	var ubacirezultat="^*/+";
	for (var i=0; i<ubacirezultat.length; i++)
		if (znak == ubacirezultat.charAt(i)) {return true}
	return false
}

function BrojAtoma(znak) {
	var atom = "1234567890";
	for (var i=0; i<atom.length; i++)
		if (znak == atom.charAt(i)) {return true} {return false}
}

function kemilimat(znak) {
	var atom = "rsu";
	if (atom.indexOf(znak) == -1) {return true} {return false}
}


function numformat(x){
	var kut = new Array("auto", "sci", "fix");
	decimala = x;
	var broj = document.racunalo.oldrezultat.value;

	if (decimala < 13) {
		document.racunalo.notes.value += "[" + kut[asf] + decimala + "]";
	}
	else {
		decimala = 14;
		document.racunalo.notes.value += "[" + kut[asf] + "]";
	}
	
	if (broj != "0" && broj != "") {
		izgledbroja(broj)
	}
	else {
		document.racunalo.notes.value += enter;
	}
	document.racunalo.zadatak.focus();
}


function scifix(x) {
	var kut = new Array("numauto", "numsci", "numfix");

	document.getElementById(kut[asf]).style.color = '#ccc';

	asf = x;
	var broj = document.racunalo.oldrezultat.value;
	switch(x) {
	case 1:
		document.getElementById('numsci').style.color = '#000';
		if (decimala == 14) {
			document.racunalo.notes.value += "[sci]";
		}
		else {
			document.racunalo.notes.value += "[sci" + decimala + "]";
		}
		break;    
	case 2:
		document.getElementById('numfix').style.color = '#000';
		document.racunalo.izaZareza.options[2].selected = true;
		if (decimala == 14) {
			decimala = 2;
			document.racunalo.notes.value += "[fix2]";
		}
		else {
			document.racunalo.notes.value += "[fix" + decimala + "]";
		}
		break;
	default:
		document.getElementById('numauto').style.color = '#000';
		document.racunalo.izaZareza.options[14].selected = true;
		document.racunalo.notes.value += "[auto]";
		decimala = 14;
	}

	if (broj != "0" && broj != "") {izgledbroja(broj)}
	document.racunalo.zadatak.focus();
}


function raddeg(x) {
	var kut = new Array("numrad", "numdeg", "numgrad");

	document.getElementById(kut[rdg]).style.color = "#ccc";
	rdg = x;
	document.getElementById(kut[x]).style.color = "#000";
	document.racunalo.zadatak.focus();
}

function seplk() {
	var broj = document.racunalo.oldrezultat.value;
	if (document.getElementById('seplk').checked) {
		document.getElementById('seplk').checked = false;
		sep1000 = 0;
	}
	else {
		document.getElementById('seplk').checked = true;
		sep1000 = 1;
	}
	if (broj.length > 3) {izgledbroja(broj)}
}


function izgledbroja(broj) {
	var nule = "000000000000000";
	var minus = "";
	if (broj.charAt(0) == "-") {minus = "-";}

	if (asf == 2) {
		if (Math.eval(broj+"*"+minus+"1-1e-"+decimala) < 0) {broj = "0"}
	}
	
	var eplace = broj.indexOf("e");

	if (eplace > 0) {
		var x = broj.substring(0, eplace);
		var y = broj.substring(eplace);
	}
	else if (asf == 1) {
		var x = parseFloat(broj) * 1E50;
		broj = x.toString();
		eplace = broj.indexOf("e");
		x = broj.substring(0, eplace);
		var y = broj.substring(eplace+1);

		y = parseInt(y) - 50;
		y = "e" + y;
	}
	else {
		var x = broj;
		var y = "";
	}
	
	var oplace = broj.indexOf(".");
	broj = parseInt(x);
	if (oplace == -1) {x = "0";} {x = "0" + x.substring(oplace);}
	x = parseFloat(x);

	with (Math) {
		x = round(x * pow(10,decimala)) / pow(10,decimala);
		broj = abs(broj) + x;
	}

	x = broj.toString();

	oplace = x.indexOf(".");
//document.racunalo.notes.value += enter + "oplace_1 = " + oplace;
	if (oplace == 0) {
		broj = "0" + x + nule.substring(0, decimala);
	}
	else if (oplace > 0) {
		x = x.concat(nule);
		broj = x.substring(0, oplace);
		broj += x.substring(oplace, oplace+decimala+1);
	}
	else {
		broj = x + "." + nule.substring(0, decimala);
	}

	if (decimala == 14) {broj = parseFloat(broj)}
	broj = minus.concat(broj, y);

	
//PROBA   POCETAK
	if (sep1000) {
//document.racunalo.notes.value += enter + "separator_1 = " + broj;
		var rezultat = "";
		var strexp = "";

		oplace = broj.indexOf('.');
		//if (oplace == -1) {oplace = 0;}
		eplace = broj.indexOf('e');
		if (eplace == -1) {eplace = broj.length;} {strexp = broj.substring(eplace);}

		var tri = 0;
		for (var i=oplace+1; i<eplace; i++) {
			tri += 1;
			if (tri == 3) {
				rezultat += broj.charAt(i) + " ";
				tri = 0;
			}
			else {
				rezultat += broj.charAt(i);
			}
		}
		rezultat += strexp
//document.racunalo.notes.value += enter + "separator_2 = " + rezultat;			
		if (oplace > -1) {
			rezultat = "." + rezultat;
			tri = 0;
			for (var i=oplace-1; i>=0; i--) {
				if (tri == 3) {
					rezultat = broj.charAt(i) + " " + rezultat;
					tri = 0;
				}
				else {
					rezultat = broj.charAt(i) + rezultat;
				}
				tri += 1;
			}
		}
		rezultat = rezultat.replace("- ", "-");
		broj = rezultat;
//document.racunalo.notes.value += enter + "separator_3 = " + rezultat;
	}
//PROBA   KRAJ

	document.racunalo.rezultat.value = broj;
	document.racunalo.notes.value += " = " + broj + enter;
	
	return broj;
}


function zaokruzi_new(ebroj) {
// max 16 decimala
//var n=16;
var x=ebroj.toExponential(decimala);
document.racunalo.notes.value += enter + "toExponential = " + x + enter;
var x=ebroj.toPrecision(decimala);
document.racunalo.notes.value += "toPrecision = " + x + enter;
var x=ebroj.toFixed(decimala);
document.racunalo.notes.value += "toFixed = " + x + enter;

	document.racunalo.rezultat.value = x;
	document.racunalo.notes.value += " = " + x + enter;
}


function vidi(me) {
	//if (document.getElementById) {
		stanje = (document.getElementById(me).style.display == 'block') ? 'none' : 'block';
		document.getElementById(me).style.display = stanje;
		//document.getElementById(me).style.visibility = stanje
	//}
}

//Eni Generalic, Split, Create: 1999/10/14; Update: 2008/03/01
// Copyright © 2008 by EniG.

CSS

Paste this code into your external CSS file or in the <style> section within the HEAD section of your HTML document.

/* --------------------------------------------------------- */
/*                            Calc4Chem                               */
/* --------------------------------------------------------- */

#calc4chem {
	position: relative;
	top: 15px;
	width: 529px;
	height: 377px;
 	margin: auto;
	border: 3px outset;
	background: #e4e4e4;
	text-align: center;
	color: #eee;
}

#kalkulator {
 position: absolute;
 top: 3px;
 left: 3px;
 width: 257px;
 height: 365px;
 border: 0px ridge #f00;
 background: #e4e4e4;
 color: #fff;
}

#biljeska {
 position: absolute;
 top: 3px;
 left: 267px;
 width: 256px;
 height: 365px;
 border: 0px ridge #999;
 background: #e4e4e4;
 color: #fff;
}

#konstante  {
 position: absolute;
 top: 13px;
 left: 275px;
 width: 245px;
 height: 350px;
 border: 1px ridge #999;
 background: #fff;
 color: #fff;
 display: none;
 /*visibility: hidden;    visible hidden */
 text-align: center;
 overflow: auto;
}

#numformat {
 position: absolute;
 top: 138px;
 left: 3px;
 width: 245px;
 height: 225px;
 border: 1px ridge #999;
 display: none;
 background: #e4e4e4; 
 color: #fff;
}

.constnaslov {
	width: 200px;
	color: #00f;
	text-align: center;
	font: normal 12px/125% sans-serif;
	margin: 5px;
	padding-bottom: 5px;
	border-bottom: 1px #cacaba solid; 
}
.const {
	width: 200px;
	text-align: center;
	font: 11px/125% sans-serif;
	margin: 5px;
	padding-bottom: 5px;
	border-bottom: 1px #cacaba solid; 
}
.const a:link {
	display: block;
	color: #900;
	text-decoration: none;
}
.const a:visited {
	display: block;
	color: #036;
	text-decoration: none;
}
.const a:active {
	display: block;
	color: #900;
	text-decoration: none;
}
.const a:hover {
	display: block;
	background: #eaeafa;
	color: #900;
	text-decoration: none;
}


.crta {
 position: absolute;
 top: 0px;
 left: 262px;
 width: 2px;
 height: 372px;
 border: 2px inset;
 background: #fff;  /* groove ridge */
 color: #fff;
}

.tipkovnica {
 position: absolute;
 top: 138px;
 left: 5px;
 width: 245px;
 height: 228px;
 background: #e4e4e4;
}

.displej {
 position: absolute;
 top: 10px;
 left: 6px;
 width: 240px;
 height: 82px;
 border: 2px ridge #eee;
 background: #eee;
}

#numauto, #numsci, #numfix, #nummem, #numrad, #numdeg, #numgrad {
 position: absolute;
 margin-top: 2px;
 width: 26px;
 height: 10px;
 font: normal 9px sans-serif;
 color: #ccc;
 display: inline;
 border: 0px solid #e00;
 background: #eee;
}

#numauto {
left: 5px;
color: #000;
}
#numsci {
left: 37px;
}
#numfix {
left: 62px;
}
#nummem {
left: 107px;
}
#numrad {
left: 154px;
color: #000;
}
#numdeg {
left: 180px;
}
#numgrad {
left: 205px;
}

.upit {
 position: absolute;
 top: 27px;
 left: 6px;
 width: 225px;
 height: 25px;
 border: 0px;
 background: #eee;
 text-align: left;
 font: normal 9pt sans-serif;
 letter-spacing: 1px;
 color: #0a0;
}

.rezultat {
 position: absolute;
 top: 52px;
 left: 6px;
 width: 225px;
 height: 25px;
 border: 0px;
 background: #eee;
 text-align: right;
 font: bold 12pt sans-serif;
 letter-spacing: 1px;
 color: #00a;
}

.formatbr {
 position: absolute;
 top: 35px;
 left: 12px;
 width: 220px;
 height: 95px;
 border: 1px solid #cdcdcd;
 background: #e8e8e8;
}
.formatnaslov {
 position: relative;
 margin-top: 5px;
 font: normal 12pt cursive;
 text-align: center;
}

.automatik, .scienc, .fiksed   {
 position: absolute;
 left: 6px;
 font: normal 10pt sans-serif;
}
.automatik {top: 10px;}
.scienc {top: 38px;}
.fiksed {top: 66px;}

.decnaslov {
 position: absolute;
 top: 10px;
 left: 110px;
 width: 110px;
 text-align: center;
 font: normal 10pt sans-serif;
 color: #000;
 border: 0px solid #cdcdcd;
}
.decimal {
 position: absolute;
 top: 32px;
 left: 136px;
 width: 60px;
 height: 22px;
}
.separator {
 position: absolute;
 top: 70px;
 left: 65px;
 width: 150px;
 text-align: right;
 font: normal 10pt sans-serif;
 color: #000;
 border: 0px solid #cdcdcd;
 }
 
.rad {
 position: absolute;
 top: 140px;
 left: 12px;
 width: 220px;
 height: 21px;
 border: 1px solid #cdcdcd;
 background: #e8e8e8;
}

.deg {
 position: relative;
 margin: 4px;
 top: -1px;
 font: normal 10pt sans-serif;
}

.cls {
 position: absolute;
 top: 103px;
 left: 217px;
 width: 30px;
 height: 22px;
 color: #f00;
 display: none;
}

.zadatak {
 position: absolute;
 top: 98px;
 left: 6px;
 width: 240px;
 height: 28px;
 border: 2px groove #eee;
 background: #fff;
}

.unos {
 position: absolute;
 top: 1px;
 left: 4px;
 width: 228px;
 height: 23px;
 border: 0px;
 font: bold 10pt cursive;
 color: #060;
}


.tekstarea {
 position: absolute;
 top: 10px;
 left: 8px;
 width: 238px;
 height: 317px;
 padding: 0px 0px 0px 5px;
 border: 2px groove #ccc;
 background: #fff;  /*plavo*/
 font: normal 9pt/150% monospace;
 color: #345678;
 overflow: auto;
}

.n1, .n2, .n3, .n4  {
 position: absolute;
 top: 340px;
 height: 24px;
 width: 80px;
 font: normal 9pt sans-serif;
 color: #000;
 }

.n1   {
 left: 8px; 
}
.n2   {
 left: 91px; 
}
.n3   {
 left: 174px; 
}
.n4   {
 top: 174px;
 left: 85px; 
}
.n2copy   {
 position: absolute;
 left: 0px;
 top: 206px;
 width: 242px;
 color: #aaa;
 font: normal 9pt sans-serif;
 text-align: center;
}

.b11, .b12, .b13, .b14, .b15, .b16, .b21, .b22, .b23, .b24, .b25, .b26, .b31, .b32, .b33, .b34, .b35, .b36 {
 position: absolute;
 height: 25px;
 width: 40px;
 padding: 0px;
 color: #000;
 font: normal 10pt monospace;
 }

.b41, .b42, .b43, .b44, .b45, .b46, .b51, .b52, .b53, .b54, .b55, .b56, .b61, .b62, .b63, .b64, .b65, .b66, .b71, .b72, .b73, .b74, .b75, .b76 {
 position: absolute;
 height: 35px;
 width: 40px;
 padding: 0px;
 color: #000;
}

.b55, .b75   {
 position: absolute;
 height: 35px;
 width: 81px;
 font: normal 10pt sans-serif;
 color: #000;
 }
 
.b75   {
 position: absolute;
 height: 35px;
 width: 81px;
 font: normal 15pt sans-serif;
 color: #050;
 }
 
.b45, .b46 {
 font: normal 10pt sans-serif;
 color: #a00;
 }
 
 .b34 {
 font: normal 10pt sans-serif;
 }
 
.b44, .b54, .b74 {
 font: bold 13pt sans-serif;
 color: #00f;
 }
.b64 {
 font: normal 15pt serif;
 color: #00f;
 }
 
.b41, .b42, .b43, .b51, .b52, .b53, .b61, .b62, .b63, .b71, .b72 {
 font: normal 12pt cursive;
 color: #575;
 }
 
.b11, .b12, .b13, .b14, .b15, .b16 {
top: 0px;
}

.b21, .b22, .b23, .b24, .b25, .b26 {
top: 26px;
}

.b31, .b32, .b33, .b34, .b35, .b36 {
top: 52px;
}

.b41, .b42, .b43, .b44, .b45, .b46  {
top: 85px;
}

.b51, .b52, .b53, .b54, .b55, .b56  {
top: 121px;
}

.b61, .b62, .b63, .b64, .b65, .b66  {
top: 156px;
}

.b71, .b72, .b73, .b74, .b75, .b76  {
top: 192px;
}


.b11, .b21, .b31, .b41, .b51, .b61, .b71 {
left: 0px
}

.b12, .b22, .b32, .b42, .b52, .b62, .b72 {
left: 41px
}

.b13, .b23, .b33, .b43, .b53, .b63, .b73 {
left: 82px
}

.b14, .b24, .b34, .b44, .b54, .b64, .b74 {
left: 123px
}

.b15, .b25, .b35, .b45, .b55, .b65, .b75 {
left: 164px
}

.b16, .b26, .b36, .b46, .b56, .b66, .b76 {
left: 205px
}

/*                     END of  Calc4Chem                       */
/* --------------------------------------------------------- */



/*Eni Generalic, Split, Create: 1999/10/14; Update: 2008/02/27   */
/* Copyright © 2008 by EniG.   */

Head

Paste this code into the HEAD section of your HTML document.


<script type="text/javascript" src="calc4chem.js"></script>

// Multiple onload function created by: Simon Willison
// http://simonwillison.net/2004/May/26/addLoadEvent/
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(start);

Body

Paste this code into the BODY section of your HTML document


<div id="calc4chem">

<!-- BEGIN  calc4chem -->

<form action="http://www.periodni.com" name="racunalo">
<input type="hidden" name="oldrezultat" value="">
<input type="hidden" name="memorija" value="Memory recall">

<div id="kalkulator">

<div class="displej">
<input type="text" name="numauto" value="AUTO" id="numauto" onfocus="ascifix[0].click()">
<input type="text" name="numsci" value="SCI" id="numsci" onfocus="ascifix[1].click()">
<input type="text" name="numfix" value="FIX" id="numfix" onfocus="ascifix[2].click()">
<input type="text" name="nummem" value="MEM" id="nummem" onfocus="MS.click()">
<input type="text" name="numrad" value="RAD" id="numrad" onfocus="stupnjevi[0].click()">
<input type="text" name="numdeg" value="DEG" id="numdeg" onfocus="stupnjevi[1].click()">
<input type="text" name="numgrad" value="GRAD" id="numgrad" onfocus="stupnjevi[2].click()">

<input type="text" name="upit" value="Problem" onClick="this.select()" class="upit">
<input type="text" name="rezultat" value="Solution" onClick="this.select()" class="rezultat">
</div>

<div class="zadatak">
<input type="text" name="zadatak" value="" onKeyDown="if (event.keyCode==13) {enter.click()}" class="unos">
</div>

<input type="button" name="cls" value="Cls" title="Clear" onClick="memory(3)" class="cls">
<div class="tipkovnica">

<input type="button" name="sqrt" value="√¯" title="Square root" onClick="izracunaj(3)" class="b11">
<input type="button" name="root" value="y√¯x" title="Root" onClick="izracunaj(22)" class="b12">
<input type="button" name="ln" value="ln" title="Natural logarithm" onClick="izracunaj(5)" class="b13">
<input type="button" name="log" value="log" title="Common logarithm" onClick="izracunaj(8)" class="b14">
<input type="button" name="tan" value="tan" title="Tangent" onClick="izracunaj(14)" class="b15">
<input type="button" name="atan" value="atan" title="Arc tangent" onClick="izracunaj(10)" class="b16">

<input type="button" name="kvadrat" value="x²" title="Square" onClick="izracunaj(2)" class="b21">
<input type="button" name="potencija" value="x^y" title="Power" onClick="izracunaj(21)" class="b22">
<input type="button" name="aln" value="e^x" title="Natural antilogarithm" onClick="izracunaj(6)" class="b23">
<input type="button" name="alog" value="10^x" title="Common antilogarithm" onClick="izracunaj(9)" class="b24">
<input type="button" name="cos" value="cos" title="Cosine" onClick="izracunaj(15)" class="b25">
<input type="button" name="acos" value="acos" title="Arc cosine" onClick="izracunaj(11)" class="b26">

<input type="button" name="sign" value="+/-" title="Sign change" onClick="izracunaj(4)" class="b31">
<input type="button" name="1/x" value="1/x" title="Reciprocal" onClick="izracunaj(7)" class="b32">
<input type="button" name="fact" value="x!" title="Factorial" onClick="izracunaj(20)" class="b33">
<input type="button" name="postotak" value="%" title="Percent" onClick="izracunaj(17)" class="b34">
<input type="button" name="sin" value="sin" title="Sine" onClick="izracunaj(16)" class="b35">
<input type="button" name="asin" value="asin" title="Arc sine" onClick="izracunaj(12)" class="b36">

<input type="button" name="7" value="7" title="Seven" onClick="dodajBroj(7)" class="b41">
<input type="button" name="8" value="8" title="Eight" onClick="dodajBroj(8)" class="b42">
<input type="button" name="9" value="9" title="Nine" onClick="dodajBroj(9)" class="b43">
<input type="button" name="djeljeno" value="÷" title="Division" onClick="dodajBroj('/')" class="b44">
<input type="button" name="MS" value="MS" title="Memory store" onClick="memory(1)" class="b45">
<input type="button" name="MR" value="MR" title="Memory recall" onClick="memory(2)" class="b46">

<input type="button" name="4" value="4" title="Four" onClick="dodajBroj(4)" class="b51">
<input type="button" name="5" value="5" title="Five" onClick="dodajBroj(5)" class="b52">
<input type="button" name="6" value="6" title="Six" onClick="dodajBroj(6)" class="b53">

<input type="button" name="puta" value="×" title="Multiplication" onClick="dodajBroj('*')" class="b54">
<input type="button" name="con" value="Constants" title="Physical Constants" onClick="vidi('konstante'); return false;" class="b55">

<input type="button" name="1" value="1" title="One" onClick="dodajBroj(1)" class="b61">
<input type="button" name="2" value="2" title="Two" onClick="dodajBroj(2)" class="b62">
<input type="button" name="3" value="3" title="Three" onClick="dodajBroj(3)" class="b63">
<input type="button" name="minus" value="-" title="Subtraction" onClick="dodajBroj('-')" class="b64">
<input type="button" name="lijevo" value="(" title="Parentheses" onClick="dodajBroj('(')" class="b65">
<input type="button" name="desno" value=")" title="Parentheses" onClick="dodajBroj(')')" class="b66">

<input type="button" name="0" value="0" title="Zero" onClick="dodajBroj(0)" class="b71">
<input type="button" name="." value="." title="Decimal point" onClick="dodajBroj('.')" class="b72">
<input type="button" name="exp" value="exp" title="Exponent" onClick="dodajBroj('e')" class="b73">
<input type="button" name="plus" value="+" title="Addition" onClick="dodajBroj('+')" class="b74">
<input type="button" name="enter" value="=" title="Calculate" onClick="izracunaj(1)" class="b75">

</div>   <!-- END  tipkovnica -->

<div id="numformat">
<p class="formatnaslov">Number formats</p>
<div class="formatbr">

<div class="automatik">
<input type="radio" name="ascifix" checked title="Automatic" onClick="scifix(0)">
<a href="javascript:document.racunalo.ascifix[0].click()" onMouseOver="self.status='Automatic'; return true">Auto</a>
</div>
<div class="scienc">
<input type="radio" name="ascifix" title="Scientific notation" onClick="scifix(1)">
<a href="javascript:document.racunalo.ascifix[1].click()" onMouseOver="self.status='Scientific notation'; return true">Sci</a>
</div>
<div class="fiksed">

<input type="radio" name="ascifix" title="Fixed number of decimal places" onClick="scifix(2)">
<a href="javascript:document.racunalo.ascifix[2].click()" onMouseOver="self.status='Fixed number of decimal places'; return true">Fix</a>
</div>
<div class="decnaslov">Decimals</div>
<select name="izaZareza" SIZE="1" onChange="numformat(this.selectedIndex)" class="decimal">
<option value="0"> 0 </option>
<option value="1"> 1 </option>
<option value="2"> 2 </option>
<option value="3"> 3 </option>

<option value="4"> 4 </option>
<option value="5"> 5 </option>
<option value="6"> 6 </option>
<option value="7"> 7 </option>
<option value="8"> 8 </option>
<option value="9"> 9 </option>

<option value="10"> 10 </option>
<option value="11"> 11 </option>
<option value="12"> 12 </option>
<option value="13"> ---- </option>
<option value="14" selected> auto </option>
</select>
<div class="separator">

<a href="javascript:seplk()" onMouseOver="self.status='Separator tisu?ica'; return true">1000 separator </a>
<input type="checkbox" id="seplk" onClick="seplk()">
</div>
</div>   <!-- END  formatbr -->

<div class="rad">
<input type="radio" name="stupnjevi" checked title="Radians" onClick="raddeg(0)">
<span class="deg">
<a href="javascript:document.racunalo.stupnjevi[0].click()" onMouseOver="self.status='Radians'; return true">Rad </a>
</span>
<input type="radio" name="stupnjevi" title="Degrees" onClick="raddeg(1)">
<span class="deg">
<a href="javascript:document.racunalo.stupnjevi[1].click()" onMouseOver="self.status='Degrees'; return true">Deg </a>

</span>
<input type="radio" name="stupnjevi" title="Grads" onClick="raddeg(2)">
<span class="deg">
<a href="javascript:document.racunalo.stupnjevi[2].click()" onMouseOver="self.status='Grads'; return true">Grad</a>
</span>
</div>
<input type="button" name="close" value="Close" title="Close Form" onClick="memory(4)" class="n4">
<div class="n2copy">Copyright © 2008 by Eni Generalic</div>
</div>   <!-- END  numformat -->

</div>   <!-- END  racunalo -->

<div id="biljeska">

<textarea name="notes" class="tekstarea">

  Calc4Chem - www.periodni.com

</textarea>

<input type="button" name="mode" value="Mode" title="Number formats" onClick="memory(4)" class="n1">
<input type="button" name="select" value="Select All" title="Select All" onClick="document.racunalo.notes.select()" class="n2">
<input type="reset" name="clear" value="Clear" title="Clear All" onClick="memory(5)" class="n3">

</div>   <!-- END  biljeska -->


<div id="konstante">
<div class="constnaslov"><b>PHYSICAL CONSTANTS</b></div>

<div class="const" onClick="dodajConst(-273.15)"><a href="#">Absolute zero<br>-273.15 °C</a></div>
<div class="const" onClick="dodajConst(9.80665)"><a href="#">Acceleration of free fall, standard<br>9.80665 m/s<sup>2</sup></a></div>
<div class="const" onClick="dodajConst(1.6605402e-27)"><a href="#">Atomic mass unit<br>1.6605402×10<sup>-27</sup> kg</a></div>
<div class="const" onClick="dodajConst(6.0221367e23)"><a href="#">Avogadro constant<br>6.0221367×10<sup>23</sup> 1/mol</a></div>

<div class="const" onClick="dodajConst(2.718281828)"><a href="#">Base of natural logarithms <br>2.718281828</a></div>
<div class="const" onClick="dodajConst(1.380658e-23)"><a href="#">Boltzmann constant<br>1.380658×10<sup>-23</sup> J/K</a></div>
<div class="const" onClick="dodajConst(2.81794092e-15)"><a href="#">Classical electron radius<br>2.81794092×10<sup>-15</sup> m</a></div>

<div class="const" onClick="dodajConst(9.1093897e-31)"><a href="#">Electron mass<br>9.1093897×10<sup>-31</sup> kg</a></div>
<div class="const" onClick="dodajConst(5.44617013e-4)"><a href="#">Electron-proton mass ratio<br>5.44617013×10<sup>-4</sup></a></div>
<div class="const" onClick="dodajConst(1.6021892e-19)"><a href="#">Electronvolt<br>1.6021892×10<sup>-19</sup> J</a></div>

<div class="const" onClick="dodajConst(1.60217733e-19)"><a href="#">Elementary charge<br>1.60217733×10<sup>-19</sup> C</a></div>
<div class="const" onClick="dodajConst(96485.309)"><a href="#">Faraday constant<br>96485.309 C/mol</a></div>
<div class="const" onClick="dodajConst(3.7417749e-16)"><a href="#">First radiation constant<br>3.7417749×10<sup>-16</sup> W m<sup>2</sup></a></div>

<div class="const" onClick="dodajConst(8.314510)"><a href="#">Molar gas constant<br>8.314510 J/mol K</a></div>
<div class="const" onClick="dodajConst(0.02241410)"><a href="#">Molar volume<br>(Ideal gas, <i>T</i> = 273.15 K, <i>p</i> = 101.325 kPa)<br>0.02241410 m<sup>3</sup>/mol</a></div>
<div class="const" onClick="dodajConst(6.67259e-11)"><a href="#">Newtonian constant of gravitation<br>6.67259×10<sup>-11</sup> N m<sup>2</sup>/kg<sup>2</sup></a></div>

<div class="const" onClick="dodajConst(12.566370614e-7)"><a href="#">Permeability of vacuum<br>12.566370614×10<sup>-7</sup> N/A<sup>2</sup></a></div>
<div class="const" onClick="dodajConst(8.854187817e-12)"><a href="#">Permittivity of vacuum<br>8.854187817×10<sup>-12</sup> F/m</a></div>
<div class="const" onClick="dodajConst(3.1415926535897932)"><a href="#">PI<br>3.1415926535897932</a></div>

<div class="const" onClick="dodajConst(6.6260755e-34)"><a href="#">Planck constants<br>6.6260755×10<sup>-34</sup> J s</a></div>
<div class="const" onClick="dodajConst(0.01438769)"><a href="#">Second radiation constant<br>0.01438769 m K</a></div>
<div class="const" onClick="dodajConst(1400)"><a href="#">Solar constant<br>1400 W/m<sup>2</sup></a></div>
<div class="const" onClick="dodajConst(299792458)"><a href="#">Speed of light in vacuum<br>299792458 m/s</a></div>

<div class="const" onClick="dodajConst(340)"><a href="#">Speed of sound in air at STP<br>340 m/s</a></div>
<div class="const" onClick="dodajConst(101325)"><a href="#">Standard pressure<br>101325 Pa</a></div>
</div>   <!-- END  konstante -->

</form>

<div class="crta"></div>
</div>

<!-- END  calc4chem -->

User Comments

Add a comment, suggestion, or correction

Comments feed

Do you write JavaScripts?
If you do, why not submit them to us?
We'll give you credit and a link back to your Web site.

Navigation Menu

Internet.commerce

Developer Channel

Great Sites

Promotions