div+css js按钮特效 鼠标移上去显示子菜单
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<TITLE>按钮</TITLE>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gb2312">
<LINK href="style/skin2.css" type=text/css rel=stylesheet>
<SCRIPT type=text/javascript>              
var waitting = 1;              
var secondLeft = waitting;              
var timer;                              
var sourceObj;              
var number;              
function getObject(objectId)//获取id的函数               
    {              
        if(document.getElementById && document.getElementById(objectId)) {              
        // W3C DOM              
        return document.getElementById(objectId);              
        } else if (document.all && document.all(objectId)) {              
        // MSIE 4 DOM              
        return document.all(objectId);              
        } else if (document.layers && document.layers[objectId]) {              
        // NN 4 DOM.. note: this won't find nested layers              
        return document.layers[objectId];              
        } else {              
        return false;              
        }              
    }              
function SetTimer()//主导航时间延迟的函数              
    {              
        for(j=1; j <10; j++){              
            if (j == number){