Hi Rammohan,
check the below script, it may help u,
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Test Page</title>
<script type="text/javascript">
function doChange(srcE, targetId)
{
var val = srcE.options[srcE.selectedIndex].value;
var targetE = document.getElementById(targetId);
alert(val);
removeAll(targetE);
if(val == 'languages')
{
addOption('C++', targetE);
addOption('Java', targetE);
addOption('Scheme', targetE);
}
else if(val == 'tools')
{
addOption('Visual Studio', targetE);
addOption('Netbeans', targetE);
addOption('Eclipse', targetE);
}
}
function addOption(value, e)
{
var o = new Option(value);
try
{
e.add(o);
}
catch(ee)
{
e.add(o, null);
}
}
function removeAll(e)
{
for(var i = 0, limit = e.options.length; i < limit - 1; ++i)
{
e.remove(1);
}
}
</script>
</head>
<body>
<form action="#">
<select name="selOne" id="selOne" onchange="doChange(this, 'selTwo')">
<option value="default">---Select Something---</option>
<option value="languages">Languages</option>
<option value="tools">Tools</option>
</select>
<select name="selTwo" id="selTwo">
<option value="default">---Select Something---</option>
</select>
</form>
</body>
</html>
and check this link also,
http://www.felgall.com/jstip22.htm
Oct 18, 2010
