max = "";
dir = 65; //scroll speed = ½ºÅ©·Ñ ½Ã°£ 10->30 »¡¶óÁü
function scrollIfrm2() {
 parent.document.body.scrollTop -= dir/1.2;
 if( parent.document.body.scrollTop != max){
  max =  parent.document.body.scrollTop;
 }else{
  //dir = dir;
  //clearTimeout(tid);
  return false;
 }

 tid = setTimeout("scrollIfrm2()", 65);
}