function check()
{
 	 
	if(document.frmjoin.email.value=="")
	{
		alert("Please Enter Email address");
		document.frmjoin.email.focus();
		return false;
	}
	 var filter=/^.+@.+\..{2,3}$/
	if(!filter.test(document.frmjoin.email.value)){
	alert("Please input a valid Email");
	document.frmjoin.email.focus();
  	  return false;
	}
 }