function callerror()
{
  var x = document.getElementById("email").value;
  var atpos = x.indexOf("@");
  var dotpos = x.lastIndexOf(".");
  
  if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
  {
	  alert('Form Error, Please include a valid email address, thank you.');
	  return false;
  }
  else
  {
	  alert('Thank You For Signing Up!');
	  return true;
  }
}