function sitenews(num, el) {
if(el) (el.className.indexOf("orange_arrow")>-1)?el.className = el.className.replace("orange_arrow", "orange_down"):el.className = el.className.replace("orange_down", "orange_arrow"); 
    allnews = $("sitenews").select(".sitenews");
    (allnews[num-1].style.display=="block")?allnews[num-1].style.display="none":allnews[num-1].style.display="block";
}