function hint_on(el) {
  if(el.value == '') {
    el.style.color = '#444444';
    el.value = el.title
  }
}
function hint_off(el) {
  if(el.value == el.title) {
    el.style.color = '#000000';
    el.value = '';
  }
}
function showHints(id) {
  var f=document.getElementById(id);
  var Errors=new Array();
  
  for (var i=0; i<f.length; i++) {
  
    if(f.elements[i].getAttribute('hint')) {
      hint_on(f.elements[i]);
    }
  }
}