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.asp"); 
		menu1.addItem("·公司文化","Culture.asp");
		menu1.addItem("·组织机构","Structure.asp");
		menu1.addItem("·成长历程","History.asp");
		menu1.addItem("·创编人员","Contact.asp");	
	
//第二菜单
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		menu2.addItem("·业务范围", "otype.asp?owen1=业务范围&owen2=业务范围&n=20"); 
		menu2.addItem("·录音设施", "otype.asp?owen1=业务范围&owen2=录音设施&n=20"); 
		menu2.addItem("·演艺人才", "otype.asp?owen1=业务范围&owen2=演艺人才&n=20"); 
	
		// menu : 3
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("·舞台灯光", "otype.asp?owen1=演出设备&owen2=舞台灯光&n=20");
		menu3.addItem("·舞台音响", "otype.asp?owen1=演出设备&owen2=舞台音响&n=20");
	    menu3.addItem("·舞台背景", "otype.asp?owen1=演出设备&owen2=舞台背景&n=20");
	　　menu3.addItem("·艺术服饰", "otype.asp?owen1=演出设备&owen2=艺术服饰&n=20");
		
		// menu : 4
		var menu4 = ms.addMenu(document.getElementById("menu4"));
		menu4.addItem("·回族风情", "otype.asp?owen1=回风·夏韵&owen2=回族风情&n=20");
		menu4.addItem("·西夏神韵", "otype.asp?owen1=回风·夏韵&owen2=西夏神韵&n=20");
		menu4.addItem("·风采宁夏", "otype.asp?owen1=回风·夏韵&owen2=风采宁夏&n=20");
		
	
		mtDropDown.renderAll();
	}