function validateForm()
{
var c=document.forms["form1"]["emailaddress"].value
var atpos=c.indexOf("@");
var dotpos=c.lastIndexOf(".");

if (atpos<1 || dotpos<atpos+2 || dotpos+2>=c.length)
  {
  alert("Please enter a valid email address");
  return false;
  }
else
{
	return true;
}
}