function validate()
{

if(document.f1.nam.value=="")
{
//document.getElementById("mail").innerHTML="*Enter the EMail";
alert("Enter Name");
document.f1.nam.focus();
return false;
}


if(document.f1.email.value=="")
{
//document.getElementById("mail").innerHTML="*Enter the EMail";
alert("Enter Email ID");
document.f1.email.focus();
return false;
}

if(document.f1.email.value!="")
{
var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
var returnval=emailfilter.test(document.f1.email.value)
if (returnval==false){
alert("Please enter a valid email address.")
document.f1.email.focus();
return false;
}
}


if(document.f1.phone.value=="")
{

alert ( "Please Enter Telephone number" );
document.f1.phone.focus();
return false;
}
{
var re10digit= /^[\(\)0-9\- \+\.]{10,20} *[extension\.]{0,9} *[0-9]{0,5}$/i 
if (document.f1.phone.value.search(re10digit)==-1)
 {
alert("Please Enter a valid Telephone Number");
document.f1.phone.focus();
return false;
} 
}


 document.f1.method="post"
	document.f1.action="webcast.asp"
	document.f1.submit();
}