function validateForm()
{
var x=document.forms["emailform"]["emailaddress"].value
var atpos=x.indexOf("@");
var dotpos=x.lastIndexOf(".");
if (atpos<1 || dotpos<atpos+2 || dotpos+2>=x.length)
  {
  alert("There was a problem with the email address you entered.  Please check your email address and try again.");
  return false;
  }
}