if (mtDropDown.isSupported()) {

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

   var menu1 = ms.addMenu(document.getElementById("menu1"));
   menu1.addItem("All","products.asp");
   
   menu1.addItem("Bar ","products.asp?ClassID=2");
   
   menu1.addItem("Flip ","products.asp?ClassID=3");
   
   menu1.addItem("slide ","products.asp?ClassID=4");
   
  


//第二菜单
   var menu2 = ms.addMenu(document.getElementById("menu2"));
   menu2.addItem("User Manual ", "download.asp");
   menu2.addItem("FAQ", "#"); 

   // menu : 3
   var menu3 = ms.addMenu(document.getElementById("menu3"));
   
   menu3.addItem("Company News ", "news.asp?ClassID=1");
   
   menu3.addItem("Industry news ", "news.asp?ClassID=2");
   

  

   // menu : 4
   var menu4 = ms.addMenu(document.getElementById("menu4"));
   
   menu4.addItem("Company Profile", "about.asp?ClassID=1");
   
   menu4.addItem("Technical team", "about.asp?ClassID=2");
   
   menu4.addItem("Certificates", "about.asp?ClassID=3");
   
  
      
   // menu : 5
   var menu5 = ms.addMenu(document.getElementById("menu5"));
   menu5.addItem("Contact us ", "Contact.asp");
   menu5.addItem("Recruitment ", "Job.asp");
   menu5.addItem("Feedback ", "feedback.asp");
  

   mtDropDown.renderAll();
}