for.. Loop New Javascripter needs help!!

[sdh]

Below is my script.
It is supposed to check the radio buttons and return there value to the text box but it only works for the first radio button. Form is called frmregister and the input code is as below. Please please help

<script type=&quot;text/javascript&quot; language=&quot;JavaScript&quot;>

<!------
function CheckRadio{
var x=document.frmregister

for (var i=0;i<4;i++)
if (x.radiobutton.checked)
{
user_input = y.value;
document.forms[&quot;frmregister&quot;].firstname.value= user_input }
}

//-->
</script>

<input type=&quot;radio&quot; name=&quot;radiobutton&quot; value=&quot;Mr&quot; onclick=&quot;return CheckRadio(this);&quot;>
Mr
<input type=&quot;radio&quot; name=&quot;radiobutton&quot; value=&quot;Mrs&quot; onclick=&quot;return Checkradio(this);&quot;>
Mrs
<input type=&quot;radio&quot; name=&quot;radiobutton&quot; value=&quot;Dr&quot; onclick=&quot;return Checkradio(this);&quot;>
Dr
<input type=&quot;radio&quot; name=&quot;radiobutton&quot; value=&quot;Other&quot; onclick=&quot;return Checkradio(this);&quot;>
Other </TD>

thanks
sdh :

 

[sdh]

doh !!!
As a vb programmer don't usually come up against this issue.
Thanks anyone who has looked at it but I now realise about Case-sensitivity in Java.

SDh