function MM_openBrWindow(theURL,winName,features) { //v2.0
	  window.open(theURL,winName,features);
	}

	if (mtDropDown.isSupported()) {
		var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);
		var menu1 = ms.addMenu(document.getElementById("menu1"));
		var menu2 = ms.addMenu(document.getElementById("menu2"),"mtDropdownMenu2");
		var menu3 = ms.addMenu(document.getElementById("menu3"),"mtDropdownMenu3");
		var menu4 = ms.addMenu(document.getElementById("menu4"),"mtDropdownMenu4");
		var menu5 = ms.addMenu(document.getElementById("menu5"),"mtDropdownMenu5");
		var menu6 = ms.addMenu(document.getElementById("menu6"),"mtDropdownMenu6");
				menu2.addItem(". 公司简介", "about.asp"); 		   
				menu2.addItem(". 我们的产品", "product.asp"); 		
				menu2.addItem(". 我们的服务", "Ourservice.asp"); 
				menu2.addItem(". 我们的设备", "Equipment.asp"); 
				
		mtDropDown.renderAll();
	}