var isDOM = document.getElementById ? true : false
var isIE = (document.all && !isDOM) ? true : false
var isNS = document.layers ? true : false

function getRef(id) {
  if (isDOM) return document.getElementById(id)
  if (isIE) return document.all[id]
  if (isNS) return document.layers[id]
}
function showMenu(tg, id){
	x = 0
	y = 0
	x += tg.offsetLeft
	y += tg.offsetHeight
	
	obj = tg;
	while(obj = obj.offsetParent)
	{
		x += obj.offsetLeft;
		y += obj.offsetTop;
	}
	tgMenu = getRef(id);
	tgMenu.style.left	= x + "px";
	tgMenu.style.top	= y + "px";
	tgMenu.style.visibility = 'inherit'
}
function hideMenu(id){
	obj = getRef(id)
	obj.style.visibility = "hidden"
}
function mainItem(str)
{
	this.title = str.split("|")[0]
	this.img = str.split("|")[1]
	this.imgSwap = str.split("|")[2]
	this.url = str.split("|")[3]
	this.sub = new Array()
}

function item(str)
{
	this.title = str.split("|")[0]
	this.url = str.split("|")[1]
	this.sub = new Array()
}
function makeMenu()
{
	var str = '';
	str += "<table width='900' border='0' cellspacing='0' cellpadding='0'>\n";
	str += "<tr>\n"
	str += "<td height='76' align='center' background='../images/bg02.gif'>\n";
	str += "<table border='0' cellspacing='0' cellpadding='0'>\n";
	str += "<tr>\n";
	for (i=0; i<Menu.length; i++){
		MM_preloadImages("../images/" + Menu[i].imgSwap);
		level2Id = "M" + i;
		str += "<td width='78' onmouseover=\"showMenu(this, '" + level2Id + "')\" onmouseout=\"hideMenu('" + level2Id + "')\">\n";
		str += "<a href='";
		str += (Menu[i].url) ? absoluteUrl +Menu[i].url : "#";
		str += "'>";
		str += "<img onmouseover=\"this.src='../images/" + Menu[i].imgSwap + "'\" onmouseout=\"this.src='../images/" + Menu[i].img + "'\" src='../images/" + Menu[i].img + "' height='28' border='0'></a>\n";
		
		str += "<div style='position:absolute; visibility:hidden;' id='" + level2Id + "' onMouseOut=\"hideMenu('" + level2Id + "')\">\n";
		str += "<table border='0' cellspacing='0' cellpadding='0'>\n";
	    str += "<tr>"
	    str += "<td valign='top' background='../images/dmenu_bg_01.gif' align='left'>\n";
	    if (Menu[i].sub.length){
	    	str += "<table border='0' cellspacing='0' cellpadding='0'>\n";
	    	str += "<tr>\n";
			str += "<td height='3'><img src='../images/dmenu_hiline_01.gif' height='3' /></td>\n";
			str += "</tr>\n";
			str += "</table>\n";
		}
	    
		for (j=0; j<Menu[i].sub.length; j++)
		{
			str += "<table border='0' cellspacing='0' cellpadding='0' align='center'>\n";
			str += "<tr>\n";
			str += "<td height='32' class='down_menu'><img src='../images/sub_menu_point02.gif' width='7' height='7' hspace='7' vspace='3' align='absmiddle' />\n";
			str += "<a href='";
			str += (Menu[i].sub[j].url) ? absoluteUrl + Menu[i].sub[j].url : "#";
			str += "'>\n";
			str += Menu[i].sub[j].title;
			str += "</a></td>\n";
			str += "</tr>\n";
			str += "<tr>\n";
			str += "<td height='2'><img src='../images/dmenu_line_01.gif' height='2' /></td>\n";
			str += "</tr>\n";
			str += "</table>\n";
		}
		str += "</td>\n";
		str += "</tr>\n";
		str += "</table>\n";
		str += "</div>\n"
		
		str += "</td>\n";
		if (i < Menu.length-1)
			str += "<td width='140'>&nbsp;</td>\n";
	}
	str += "</tr>\n";
	str += "</table>\n";
	str += "</td>\n";
	str += "</tr>\n";
	str += "</table>\n";
	document.write(str);
}

//絕對路徑(記得最後+ "/");
var absoluteUrl = "";

/*
	mainItem的格式：名稱|圖檔|連結
		名稱-無作用，僅供確認
		圖檔-位於images
		連結-接在絕對路徑後的路徑
	item的格式：名稱|路徑(接在絕對路徑後)
*/
var Menu = new Array();
Menu[0] = new mainItem("aboutus|ne01.gif|ne01_o.gif|../about/about.php")
		Menu[0].sub[0] = new item("耕昇品牌介绍|../about/about.php?about_id=1");
		Menu[0].sub[1] = new item("发展历程|../about/about.php?about_id=2");
		Menu[0].sub[2] = new item("合作伙伴|../about/about.php?about_id=3");
	Menu[1] = new mainItem("product|ne02.gif|ne02_o.gif|../product/productvga.php?act=category");
		//Menu[1].sub[] = new item("|../product/product.php?pc1_id=");
		Menu[1].sub[0] = new item("显卡|../product/productvga.php?act=category")
		
Menu[2] = new mainItem("news|ne03.gif|ne03_o.gif|../news/news1.php");
		Menu[2].sub[0] = new item("耕昇新闻|../news/news1.php");
		Menu[2].sub[1] = new item("产品评测|../news/news2.php");
		Menu[2].sub[2] = new item("耕昇荣誉|../news/news3.php");
	Menu[3] = new mainItem("support|ne04.gif|ne04_o.gif|../support/support.php");
	Menu[3].sub[0] = new item("下载服务|../support/download.php");
	Menu[3].sub[1] = new item("售后服务条款|../support/rule.php");
	Menu[3].sub[2] =new item("常见问题解答|../support/qa.php");