function checkdata_s()

{

     if (document.subscribe.email.value.length == 0) {

         alert ("The ['E-Mail'] field requires an entry.");

         document.subscribe.email.focus();

         return false;

     }
	 
	var x = document.subscribe.email.value;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (!filter.test(x)){
		alert ("The ['E-mail'] address is NOT valid.");
		document.subscribe.email.focus();
		 return false;
		}
	
     return true;



}