Radio button with javascript - - Please HeLP !

Question

Hi,
I have the following code
My question is:-
Q : Clicking on Submit button. gives a javascript
message "Please make a selection" even though when I selected a radio button
     I have haspmap which displays possible answers to a question in a radiobutton type. When submit is prssed, I like to check whether a selection is made or not. and if not, I want a message shown. And when selected. I want page to prcede to processSurveyInfo.do
Please help
<script language="javascript">
function checkRBtn()
     var name = document.forms[getNetuiTagName("studentmultpChcform", this)][getNetuiTagName("rbtn", this)].value;
     if ((name==null) || (name=="Undefined")) {
     alert("Please make a selection");}
     else {
     document.forms[getNetuiTagName("studentmultpChcform", this)].method="POST";
     document.forms[getNetuiTagName('studentmultpChcform', this)].action="<netui:rewriteURL URL="/TrainingActivity/Administration/SurveyFile/processSurveyInfo.do" />";
     document.forms[getNetuiTagName("studentmultpChcform", this)].submit(); }
</script>
<table align="center">
<tr>
<td>
<netui:button value="Next-->" type="submit" styleClass="commonButtons" onClick="checkRBtn(); return false;" tagId="nq"/> </td>
<td>
<netui:button value="Finish" tagId="finbtn" action="fwdfinish"/> </td>
</tr>
</table>
<table align="center">
<tr>
<td>
<netui:button value="Next-->" type="submit" styleClass="commonButtons" onClick="checkRBtn(); return false;" tagId="nq"/> </td>
<td>
<netui:button value="Finish" tagId="finbtn" action="fwdfinish"/> </td>
</tr>
</table>
please help me out.
Thanks
-Raza-

Answer 1

You need to write a custom script and it's location will depend upon when you want the script to execute.
Radio Buttons and Check Boxes have a string value of "Off" when none have been selected and take the value assigned to the field when checked.