auto select radio button

[Izzy123]

how do we auto selected a radio button when the user enters a numeric value in a textbox?

my code for radio button and text box are as follows:

<li>Do you like your membership priviledge?
           <br />
           <input type="radio" name="think" id="yes" value="yes">
           <label for="yes">Yes</label>
           <br />
           <input type="radio" name="think" id="no" value="no">
           <label for="no">No</label>
       </li>
       <li>If you answered Yes to the above, how much more would you be willing to pay?
           $<input class="blue" type="text" name="money" />
       </li>

can anyone pls help cause I'm really stuck here. Thanks.

[RamananKalirajan]

Hi Izzy,
I have give a sample code which will check the radio obj when the user enters a number in input text.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script type="text/javascript">
function isNumberKey(evt)
{
	 var charCode = (evt.which) ? evt.which : event.keyCode
	 if (charCode > 31 && (charCode < 48 || charCode > 57))
		return false;
	 return true;
}

function enableRadio(evt)
{
   var obj = isNumberKey(evt);
   if(obj==true)
   {
		document.getElementById('yes').checked=true;
		return true;
   }
   else
		return false;
}
</script>
</HEAD>

<BODY>
<input type="text" onkeypress="return enableRadio(event)" name="txtChar" />
<input type="radio" name="think" id="yes" value="yes">
</BODY>
</HTML>

Thanks and Regards
Ramanan Kalirajan