if (mtDropDown.isSupported()) {

// menu : 1
		var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);

		var menu1 = ms.addMenu(document.getElementById("menu1"));
		menu1.addItem("гн Brief Introduction","open.asp"); 
		menu1.addItem("гн Open News","open_news.asp");
		menu1.addItem("гн Work Opportunity","open_job.asp");
		menu1.addItem("гн Intellectual Property","open_right.asp");
		menu1.addItem("гн Associated Enterprises","open_enterprise.asp");
		menu1.addItem("гн Contact Us", "contact.asp");

		
		
	
// menu : 2
		var menu2 = ms.addMenu(document.getElementById("menu2"));
		menu2.addItem("гн Roofpro Joist and Floorpro Joist", "open_joinst.asp"); 
		menu2.addItem("гн Technical Advantage", "open_joinst_techonlogy.asp");
		menu2.addItem("гн Economical Advantage", "open_joinst_economy.asp");
		menu2.addItem("гн History of Steel Joist", "open_joinst_history.asp");
		menu2.addItem("гн Various Kind of Steel Joist", "open_joinst_pic.asp");
	 
	

// menu : 3
		var menu3 = ms.addMenu(document.getElementById("menu3"));
		menu3.addItem("гл Purlin Span", "product1_1.asp");
		menu3.addItem("гл Floorpro", "product2_1.asp");
		menu3.addItem("гл Buckling Restrained Brace", "product3_1.asp");
		menu3.addItem("гл Traditional Steel Structure", "product4_1.asp");
		menu3.addItem("гн Joist Jack Beam", "product6_1.asp");
		menu3.addItem("гн Joist Strut", "product7_1.asp");
		menu3.addItem("гн Joist Wind Column", "product8_1.asp");
		menu3.addItem("гн Roof Brace System", "product9_1.asp");
		
		// submenu
		var subMenu0 = menu3.addMenu(menu3.items[0]);
		subMenu0.addItem("гн Roofpro Introduction", "product1_1.asp");
		subMenu0.addItem("гн Technical Specification for Roofpro", "product1_2.asp");
		subMenu0.addItem("гн Standard Load Table for Open Roofpro", "product1_3.asp");
		
		var subMenu1 = menu3.addMenu(menu3.items[1]);
		subMenu1.addItem("гн Floorpro Introduction", "product2_1.asp");
		subMenu1.addItem("гн Technical Specification for Floorpro", "product2_2.asp");
		subMenu1.addItem("гн Comparing in Economy", "product2_3.asp");
		subMenu1.addItem("гн Test upon Full Scale Model", "product2_4.asp");
		subMenu1.addItem("гн Standard Load Table", "product2_5.asp");
		
		var subMenu2 = menu3.addMenu(menu3.items[2]);
		subMenu2.addItem("гн Buckling Restrained Brace Introduction ", "product3_1.asp");
		subMenu2.addItem("гн frame comparison between buckling restrained brace and normal brace", "product3_2.asp");
		subMenu2.addItem("гн Design and Structure of Tongji University TJI Buckling Restrained Brace", "product3_3.asp");
		subMenu2.addItem("гн Certificate of Tonji University TJI Buckling Restrained Brace", "product3_4.asp");
		subMenu2.addItem("гн Project with Buckling Restrained Brace ", "product3_5.asp");
		
		var subMenu3 = menu3.addMenu(menu3.items[3]);
		subMenu3.addItem("гн Pre-Engineered Building", "product4_1.asp");
		subMenu3.addItem("гн Roof vent and ventilator", "product4_2.asp");
		subMenu3.addItem("гн Non Standard Steel Structure", "product4_3.asp");
	
// menu : 4
		var menu4 = ms.addMenu(document.getElementById("menu4"));
		menu4.addItem("гн File Download", "service_download.asp");
		menu4.addItem("гн On Line Estimation of Steel Consumption", "service_estimated.asp");
		
		
// menu : 5	
		var menu5 = ms.addMenu(document.getElementById("menu5"));
		menu5.addItem("гн Open Steel Joist Project Experience", "case_1.asp");
		menu5.addItem("гн Steel Structure Engineering Experience", "case_2.asp");
		menu5.addItem("гн Case Study of Floorpro Erection", "case_3.asp");
		

// menu : 6
		var menu6 = ms.addMenu(document.getElementById("menu6"));
		menu6.addItem("гн Introduction to International Business Department", "international_department.asp");
		menu6.addItem("гн Operation Procedure for International Business", "international_step.asp");
		menu6.addItem("гн International Business Project Experience", "international_performance.asp");
		
		
		
		mtDropDown.renderAll();
	}