if (mtDropDown.isSupported()) {

// x轴：-10；y轴：-6 
		var ms = new mtDropDownSet(mtDropDown.direction.down, -25, 6, mtDropDown.reference.bottomLeft);

		var menu1 = ms.addMenu(document.getElementById("menu1"));
		menu1.addItem("公司概况", "about.php?ID=1");
		menu1.addItem("企业文化", "about.php?ID=2");
		menu1.addItem("客户服务", "about.php?ID=3");
		menu1.addItem("联系我们", "about.php?ID=4");
		menu1.addItem("人才招聘", "about.php?ID=5");
 
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		menu2.addItem("公司新闻", "news.php?Cid=000003");
		menu2.addItem("新品展示", "news.php?Cid=000004");

		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("DC/DC高隔离稳压0.5-3W", "prolist.php?Cid=000092");
		menu3.addItem("DC/DC隔离非稳压0.5-3W ", "prolist.php?Cid=000093");
		menu3.addItem("DC/DC宽压隔离稳压5-50W", "prolist.php?Cid=000094");
		menu3.addItem("医疗/电力4500V高隔离模块", "prolist.php?Cid=000095");
		menu3.addItem("AC/DC宽压隔离稳压1-50W", "prolist.php?Cid=000096");
		menu3.addItem("国内外各种特殊规格1-60W", "prolist.php?Cid=000097");
		menu3.addItem("DC/DC高压200V以上1-10W ", "prolist.php?Cid=000142");

		var menu4 = ms.addMenu(document.getElementById("menu4"));
		menu4.addItem("选型手册", "down.php?Cid=000005");
		menu4.addItem("应用手册", "down.php?Cid=000006");
		menu4.addItem("样品申请", "down.php?Cid=000007");


		mtDropDown.renderAll();
	}