if (mtDropDown.isSupported()) {

// x轴：-10；y轴：-6 
		var ms = new mtDropDownSet(mtDropDown.direction.down, 0, 5  , mtDropDown.reference.bottomLeft);

		var menu1 = ms.addMenu(document.getElementById('menu1'));
	menu1.addItem(' -  公司简介','about.htm'); 
	menu1.addItem(' -  经理致辞','zc.htm'); 
	menu1.addItem(' -  企业文化','wh.htm'); 
	menu1.addItem(' -  荣誉展示','ryzs.htm'); 
	var menu2 = ms.addMenu(document.getElementById('menu2'));
	menu2.addItem(' -  集装袋','cpjj01.htm'); 
	menu2.addItem(' -  塑编袋','cpjj.htm'); 
	mtDropDown.renderAll();
	}