function open_subscriber_window() {
var f = document.forms["subscribe"];
var addr = f.email.value;
var regexstring = "[a-z,A-Z,0-9,_,.,-]+@[a-z,A-Z,0-9,.,_]+";
var re = new RegExp(regexstring);
 if(re.exec(addr) != null ) {
  window.open("","subscriber_result_window","scrollbars=no,status=no,resizable=yes,toolbar=no,menubar=no,width=500,height=300")			
  f.submit();
  f.email.value="";
  return true;
 }
 f.email.value="";
 return false;
};