function checkform ( form )
{
  if (form.pc.value == "") {
    alert( "Vul uw postcode in." );
    form.pc.focus();
    return false ;
  }
  if (form.pc.value == "Uw postcode") {
    alert( "Vul uw postcode in." );
    form.pc.focus();
	form.pc.value="";
    return false ;
  }
  return true ;
}

function checkform2 ( form2 ){
  if (form2.Terms.value == "") {
    alert( "Geef uw zoekterm op." );
    form2.Terms.focus();
    return false ;
  }
  if (form2.Terms.value == "Geef zoekterm op") {
    alert( "Geef uw zoekterm op." );
    form2.Terms.focus();
	form2.Terms.value="";
    return false ;
  }
}