function checkform ( form )
{
  // see http://www.thesitewizard.com/archive/validation.shtml
  // for an explanation of this script and how to use it on your
  // own website

  // ** START **
  if (form.Name.value == "") {
    alert( "Please enter your Name" );
    form.Name.focus();
    return false ;
  }
  
  if (form.Email.value == "") {
    alert( "Please enter your Email address" );
    form.Email.focus();
    return false ;
  }

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

  if (form.Enquiry.value == "") {
    alert( "Please enter your Enquiry" );
    form.Enquiry.focus();
    return false ;
  } 
  
  // ** END **
  return true ;
}