problem with my radio button validation js

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Join Date: Mar 2008

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problem with my radio button validation js

Mar 16th, 2008

I am a newbie to javascript and have written the following code to make sure that users have checked a radio button. It is set to work on submit. The form is generated by php and has approx 70 options; users may select one. I am not even sure if the script is being processed because if I test it by submitting without checking a button, the program tries to load the next page without passing a superglobal, and of course I get a php error: "Notice: Undefined index: item in C:\Program Files\EasyPHP 2.0b1\www\dap\subtypemenu.php on line 24".

Is there something obvious in my code that is preventing it from executing? Thanks so much in advance for your help.

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<script language='JavaScript 1.2'>

function submitIt(form)
	{
	myOption = -1
	for (i=0; i<document.prodsearch.item.length; i++)
	{
		if (document.prodsearch.item[i].checked)
		{
		myOption = i
		}
			if (myOption == -1)
			{
			alert("You must make a selection.")
			return false
			}
	return true
}</script>