function $(id) {
    return document.getElementById(id);
}
function showMenu (baseID, divID) {
    baseID = $(baseID);
    divID = $(divID);
    if (showMenu.timer) clearTimeout(showMenu.timer);
    hideCur();
    divID.style.display = 'block';
    showMenu.cur = divID;
    if (! divID.isCreate) {
        divID.isCreate = true;
        //divID.timer = 0;
        divID.onmouseover = function () {
            if (showMenu.timer) clearTimeout(showMenu.timer);
            hideCur();
            divID.style.display = 'block';
        };
        function hide () {
            showMenu.timer = setTimeout(function () {divID.style.display = 'none';}, 500);
        }

        divID.onmouseout = hide;
        baseID.onmouseout = hide;
    }
    function hideCur () {
        showMenu.cur && (showMenu.cur.style.display = 'none');
    }
}
function doClick_down(o){
 o.className="current";
 var j, id, e;
 for(var i=1;i<=9;i++){
 id ="nav_"+i, j = document.getElementById(id), e = document.getElementById("nav_"+i);
 try{ j.className=""; }
catch (E){j.className=fasle}
 }
 }

function leftmenu(em){
 var ye=em.parentNode.parentNode;
	  var fatcher=em.parentNode;
	  var childes= ye.getElementsByTagName("li");
	  for(i=0;i<childes.length;i++){
	    if(childes[i]!=fatcher){
		  childes[i].className="";
		}
	  }
	  fatcher.className="current";
}