function clearText(fieldname) {
  document.getElementById(fieldname).value = "";
}
function resetText(fieldname, defaulttext) {
  var field = document.getElementById(fieldname);
  if (field.value == "") {
    field.value = defaulttext;
  }
}
function autotab(origfieldname, destfieldname) {
  var orgfield = document.getElementById(origfieldname);
  var destfield = document.getElementById(destfieldname);
  if ((orgfield.getAttribute) && (orgfield.value.length == orgfield.getAttribute("maxlength"))) {
    destfield.focus();
  }
}