if (mtDropDown.isSupported()) {

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

		var menu1 = ms.addMenu(document.getElementById("menu1"));
		menu1.addItem("- 公司概况","into.asp"); 
		menu1.addItem("- 企业文化","into1.asp");
		menu1.addItem("- 企业风采","gsfm.asp");
	
		mtDropDown.renderAll();
	}