function subscribe()
{

if(document.form1.email.value=="")
	  
	  {
		alert("Email is Required!");
		document.form1.email.focus();
		return false;
	  }

 if(document.form1.email.value!="" && !checkMail(document.form1.email.value))
	{
		alert("Email must contain an email address.\n");
		
			document.form1.email.focus();
		
		return false;
	}


function checkMail(email)
{
	var x = email;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (filter.test(x)) 
	
	{
	 return true;
	}
	else 
	{
	  return false;
	}
}
}