Date Selector

Warren Brown Jan 7, 2004

Yet another handy little script that adds drop down boxes to your site so that you can select dates. It's customizable and works for leap years as well.

The JavaScript Source: Time and Date: Date Selector

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!!!

<!-- TWO STEPS TO INSTALL DATE SELECTOR:

1.  Copy the coding into the HEAD of your HTML document
  2.  Add the last code into the BODY of your HTML document  -->

<HEAD>

<SCRIPT>
/* Javascript Date Selector
   by Warren Brown (03/01/2004 Radiokop South Africa)

Script to place Month/day/year onto a web page, leap year enabled
*/

var date_arr = new Array;
var days_arr = new Array;

date_arr[0]=new Option("January",31);
date_arr[1]=new Option("February",28);
date_arr[2]=new Option("March",31);
date_arr[3]=new Option("April",30);
date_arr[4]=new Option("May",31);
date_arr[5]=new Option("June",30);
date_arr[6]=new Option("July",31);
date_arr[7]=new Option("August",30);
date_arr[8]=new Option("September",30);
date_arr[9]=new Option("October",31);
date_arr[10]=new Option("November",31);
date_arr[11]=new Option("December",30);

function fill_select(f)
{
        document.writeln("<SELECT name=\"months\"               onchange=\"update_days(FRM)\">");
        for(x=0;x<12;x++)
                document.writeln("<OPTION value=\""+date_arr[x].value+"\">"+date_arr[x].text);
        document.writeln("</SELECT><SELECT name=\"days\"></SELECT>");
        selection=f.months[f.months.selectedIndex].value;
}

function update_days(f)
{
        temp=f.days.selectedIndex;
        for(x=days_arr.length;x>0;x--)
        {
                days_arr[x]=null;
                f.days.options[x]=null;
         }
        selection=parseInt(f.months[f.months.selectedIndex].value);
        ret_val = 0;
        if(f.months[f.months.selectedIndex].value == 28)
        {
                year=parseInt(f.years.options[f.years.selectedIndex].value);
                if (year % 4 != 0 || year % 100 == 0 ) ret_val=0;
                else
                        if (year % 400 == 0)  ret_val=1;
                        else
                                ret_val=1;
        }
        selection = selection + ret_val;
        for(x=1;x < selection+1;x++)

{
                days_arr[x-1]=new Option(x);
                f.days.options[x-1]=days_arr[x-1];
        }
        if (temp == -1) f.days.options[0].selected=true;
        else
             f.days.options[temp].selected=true;
}
function year_install(f)
{
        document.writeln("<SELECT name=\"years\" onchange=\"update_days(FRM)\">")
        for(x=2001;x<2101;x++) document.writeln("<OPTION value=\""+x+"\">"+x);
        document.writeln("</SELECT>");
        update_days(f)
}
</script>

</HEAD>

<BODY>

<FORM name="FRM">
<!--
**********************************************************************

This line creates the drop down boxes for the calendar
        replace FRM with the name of your form
        In vi you would do the following
        :%s/FRM/my_form/g

-->
<h1 align=center>JavaScript date selector</h1>
<br>
<br>
<table align="center">
<tr>
<td>
<SCRIPT>fill_select(document.FRM);year_install(document.FRM)</script></td>
</tr></table>

</FORM>

<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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