function setFocus(aPosition)
{
   var position = 0;
   if (aPosition) {
       position = aPosition;
   }

   if (document) {
      var j=0;
      for (i=0; document.forms && document.forms[0] && i < document.forms[0].elements.length; i++) {
        if ((document.forms[0].elements[i].type != "hidden" )
            && (document.forms[0].elements[i].isDisabled != true)) {
           if (j == position) {
              document.forms[0].elements[i].focus();
              return;
           } else {
              j++;
           }
        }
      }
   }
}