javascript and radio buttons !

Hi all,

I'm not able to validate if the user has checked a radio button or not. This is mainly because I'm not able to pass my form and my radio gropu to my validate.js file.

This is what I have in my form
<form>

<tr>
<td>
<input name="radio1" type="radio" value="Apple"></td>
</tr>

<tr>
<td>
<input name="radio1" type="radio" value="Orange">
</td>
</tr>

</form>

<script type = "text/javascript">
document.myForm.onsubmit = chkmyFormSubmit;
</script>


Now in my validate.js file, I'm not able to retrive the radio group through getElementsByName. I'm not sure how exactly to loop thru it.

Can someone please help me out ?

Thanks