Getting radio button values in JavaScrip

[Anon]

I am attempting to write a validation function in JavaScript for a form that contains several radio buttons. I have tried to access the value using:

document.all.item("radiobuttongroup").value

but this just returns "undefined"... how can I get the value of the currently selected button in this group?

[maxpup979]

Its easy enough--
to get the value of the currently selected radio button, loop through all values and check to see which one is selected....something like:
sentinal=0;
for(x=0;x<5;x++){
if(form.radiobuttonname[x].checked){sentinal=x;}
}

Hope this helps
Darren

[Anon]

How do alert the value of selected radio button?

[Anon]

In the above example, you should be able to get the index of the radio button that was chosen. To have that show in an alert just do:
<script language = "javascript">
function find_val(form){
sentinal=0;
for(x=0;x<5;x++){
if(form.radiobuttonname[x].checked){
sentinal=x;
}
}
alert(form.radiobuttonname[sentinal].value);
}
</script>

hope this helps
Darren