function clearform(b)
{
  form = b.form;
  elements = form.getElementsByTagName('input');
  for( i=0; i < elements.length; i++)
  {
    elm = elements[i];
    if (elm.type == "text")
    {
        elm.value = '';
    }
    if (elm.type == "checkbox")
    {
        elm.checked = false;
    }
  }
  return true;
}