if (mtDropDown.isSupported()) {

		var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);

		var menu1 = ms.addMenu(document.getElementById("menu1"));
		menu1.addItem("  公司介绍　", "about.asp?n=14");
		menu1.addItem("  组织结构　", "about.asp?n=15");
		menu1.addItem("  最新动态　", "n_info.asp?list=0");
		
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		menu2.addItem("  光通信测试", "/cn/pro.asp?n1=1");
		menu2.addItem("  PON网络测试仪表", "http://www.linpu.com.cn/cn/p_info.asp?n=221&n2=1");
		menu2.addItem("  传输/数据通信测试", "/cn/pro.asp?n1=2");
		menu2.addItem("  无线电测试", "/cn/pro.asp?n1=3");
		menu2.addItem("  移动通信测试", "/cn/pro.asp?n1=6");
		menu2.addItem("  WLAN无线网络测试", "/cn/pro.asp?n1=5");
		
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("  解决方案", "n_info.asp?list=1");
		menu3.addItem("  维修站", "tech.asp?n=2");

		mtDropDown.renderAll();
	}
function window.onload()   
{   
init();
}