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

if (form.phone.value == "") {
    alert( "Please enter your phone number." );
    form.phone.focus();
    return false ;
  }
 
if (form.title.value == "") {
    alert( "Please enter your title." );
    form.title.focus();
    return false ;
  }
  
if (form.propertyPostcode.value == "") {
    alert( "Please enter your postcode." );
    form.propertyPostcode.focus();
    return false ;
  }  
  
if (form.address.value == "") {
    alert( "Please enter the property address." );
    form.address.focus();
    return false ;
  }    
 
if (form.townCity.value == "") {
    alert( "Please enter town or city." );
    form.townCity.focus();
    return false ;
  }     

  // ** END **
  return true ;
}