if (mtDropDown.isSupported()) {
  var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 0, mtDropDown.reference.bottomLeft);
  var menu1 = ms.addMenu(document.getElementById("menu1"));

  menu1.addItem("Company Profile", "about.asp?id=1");

  menu1.addItem("Certificate", "about.asp?id=2");

  menu1.addItem("Organization Chart", "about.asp?id=3");

  menu1.addItem("Production Flow", "about.asp?id=7");

  
  var menu2 = ms.addMenu(document.getElementById("menu2"));

  menu2.addItem("Character LCM", "Pro.asp?id=1");

  menu2.addItem("Graphic LCM", "Pro.asp?id=2");

  menu2.addItem("COG/TAB LCM", "Pro.asp?id=4");

  menu2.addItem("Customized LCD type", "Pro.asp?id=15");

  
  var menu3 = ms.addMenu(document.getElementById("menu3"));

  menu3.addItem("Technical Problems", "Support.asp?id=1");

  menu3.addItem("Product Application", "Support.asp?id=2");

  
  var menu4 = ms.addMenu(document.getElementById("menu4"));
  menu4.addItem("  PERSONNEL STRUCTURE", "jobs.asp");
  menu4.addItem("  JOBS", "Job.asp");
  
  mtDropDown.renderAll();
 }