var regExpr = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/
function validate()
   {
 
           if (document.form.subscribe.value == "") {
			   alert("Please enter a valid email address");
			   document.form.subscribe.focus();
			   return false;
		   } else {
		   if (!regExpr.test(document.form.subscribe.value)) {
				alert("Please provide a valid email address\n eg:yourname@yourdomain.com")
				document.form.subscribe.focus();
				return false;
			   }
		   }

           return true;
        
   }