var alsa = {
	display: function(){
		if( !document.getElementById || !document.getElementsByTagName ) return false;
		var oDl = document.getElementById('menu').getElementsByTagName('dl'),
		oList = document.getElementById('menu').getElementsByTagName('dd'),
		iI = oDl.length - 1,
		iJ = oList.length - 1;
		for( iJ; iJ>=0; iJ-- ){
			oList[iJ].style.display = 'none';
			}
		for( iI; iI>=0; iI-- ){
			if( oDl[iI].getElementsByTagName('dd')[0] ){
				oDl[iI].onmouseover = function(){
					this.getElementsByTagName('dd')[0].style.display = 'block';
					}
				oDl[iI].onmouseout = function(){
					this.getElementsByTagName('dd')[0].style.display = 'none';
					}
				}
			}
		return true;
		}
	};

var addLoadEvent = function(func){
	var oldonload = window.onload;
	if( typeof window.onload != 'function' ){
		window.onload = func;
		}else{
			window.onload = function(){
				oldonload();
				func();
				}
			}
	};

addLoadEvent(alsa.display);