function checkform ( form )
{

  if (form.Email) {
	  if (form.Email.value == "") {
		alert( "Please enter your email address." );
		form.Email.focus();
		return false ;
	  }
	}
	
  if (form.Telephone) {
	  if (form.Telephone.value == "") {
		alert( "Please enter your Telephone number." );
		form.Telephone.focus();
		return false ;
	  }
	}

  return true ;
}