function openWindow(url) {
	mywin = window.open(url,'','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=640,height=480,alwaysRaised=yes');
	mywin.focus();
}

function isValidEmail(checkStr)
{
  // test valid email address
  var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9])+$/;
  var EmailValid = filter.test(checkStr);
  return (EmailValid);
}