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Find Friday the 13th's!

This will display all the Friday the 13th's for a range of years. You may also select a certain month to review! Awesome show of how to interpret and change the date parameters within javascript! MSIE only.

Find Friday the 13th's!!

Enter beginning year:

Enter ending year:

You may also select by a particular month:

The JavaScript Source: Time and Date: Find Friday the 13th's!
Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Command-s). The script is yours!!!


  <HEAD>     <style> #InternalDiv {position:relative;width:250px;height:1px;color:blue;background-color:#FDF5E6;border-style:double;border-color:blue;padding-top:5px;padding-left:5px;padding-right:5px;padding-bottom:5px;margin:3px;visibility:visible;z-index:10;top:50;left:0;} </style> <script> function startitup() { var BasicHTML = "<center>Results will be posted here!!</center>" document.all["InternalDiv"].innerHTML = BasicHTML; } </script> </HEAD>  <BODY onLoad="startitup()">      <script> var new_Date=new Date() //var DOW=new_Date.getDay()+1 var DOM=new_Date.getDate() //var Month=new_Date.getMonth()+1 var Year=new_Date.getFullYear() var LongMonth = new Array("January","February","March","April","May","June","July","August","September","October","November","December") var LongDay = new Array("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday") var setTimer = 5000; function find13th() { var Start = startyear.value var End = endyear.value var TooMuch = End-Start //alert(TooMuch) if (confirm("Caution, this may result in an extremely large result, and may take a long time to display those results.")) if (End < Start) //if end<start alert user, else alert("Sorry, the ending year must be greater than or equal to the beginning year..") else { //allow dates and continue var BasicHTML = "<center><u>Results!!</u>" for (YearTest=Start;YearTest<=End;YearTest++) { if (MonthSelect.value==20) { for (MonthTest=0;MonthTest<=11;MonthTest++) { var TestDate = new Date(YearTest,MonthTest,13) if (TestDate.getDay()==5) BasicHTML = BasicHTML+"<br>"+LongMonth[MonthTest]+" "+TestDate.getDate()+", "+YearTest } } else { var TestDate = new Date(YearTest,MonthSelect.value,13) if (TestDate.getDay()==5) BasicHTML = BasicHTML+"<br>"+LongMonth[MonthSelect.value]+" "+TestDate.getDate()+", "+YearTest } } document.all["InternalDiv"].innerHTML = BasicHTML; } else { alert("Please make the years closer together..") } } function clearResults() { var BasicHTML = "<center>Results will be posted here!!</center>" document.all["InternalDiv"].innerHTML = BasicHTML; } </script> <h1 style="font-size='24'">Find Friday the 13th's!!</h1> Enter beginning year: <input type="Text" size="5" maxlength="4" name="startyear" value="2002"> <br><br> Enter ending year: <input type="Text" size="5" maxlength="4" name="endyear" value="2002"> <br><br> You may also select by a particular month: <select NAME="MonthSelect" size="1" style="HEIGHT: 22px; WIDTH: 130px"> <option VALUE ="20" SELECTED>None Preferred</option> <option value="0">January</option> <option value="1">February</option> <option value="2">March</option> <option value="3">April</option> <option value="4">May</option> <option value="5">June</option> <option value="6">July</option> <option value="7">August</option> <option value="8">September</option> <option value="9">October</option> <option value="10">November</option> <option value="11">December</option> </select> <br><br> <input type="Button" value="Find" onmouseup="find13th()">      <input type="Button" value="Clear Result List" onmouseup="clearResults()"> <layer id="Layer1"><div id="InternalDiv"></div></layer><br><br><br><br> <p><center> <font face="arial, helvetica" size"-2">Free JavaScripts provided<br> by <a href="http://javascriptsource.com">The JavaScript Source</a></font> </center><p> 
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