Mega Code Archive
Return the name of the form that contains dropdown list (combobox)
<![CDATA[
<html>
<head>
<script type="text/javascript">
function formAction(){
var x=document.getElementById("mySelect")
alert(x.form.name)
}
</script>
</head>
<body>
<form name="myForm">
<select id="mySelect">
<option>Apple</option>
<option>Banana</option>
<option>Orange</option>
</select>
<input type="button" onclick="formAction()" value="Show name of the form">
</form>
</body>
</html>
]]>