if (mtDropDown.isSupported()) {

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

		var menu1 = ms.addMenu(document.getElementById("menu1"));
		menu1.addItem("   ·公司简介      ", "about.htm");
		menu1.addItem("   ·组织机构", "org.htm");
		menu1.addItem("   ·成长历程", "grow.htm");
		menu1.addItem("   ·科研成果", "pride.htm");
		
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		menu2.addItem("  ·数字电视设备", "dtv.htm");
		menu2.addItem("  ·光通信设备", "ocq.htm");
		menu2.addItem("  ·有线电视测量仪器", "catvtest.htm");
		menu2.addItem("  ·无线通信基站设备", "wireless.htm");
		menu2.addItem("  ·智能温控通风系统", "fan.htm");
		menu2.addItem("  ·视音频设备", "vaq.htm");
		menu2.addItem("  ·电源设备", "ups.htm");
		menu2.addItem("  ·无源器件", "wy.htm");
		menu2.addItem("  ·系列放大器", "amq.htm");
		menu2.addItem("  ·有线电视收费管理控制系统 ", "paysys.htm");
		menu2.addItem("  ·有线电视网络管理系统", "admsys.htm");
		
		mtDropDown.renderAll();
	}