i wrote the following code but its not properly working...
<script language="javascript">
var r=form1.gen;
function valid()
{
if(r==null)
{
alert("No Button is selected");
return false;
}
}
</script>
<html>
<body>
<form name="form">
<input type ="radio" name="gen"value="male">MALE<br>
<input...