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

var	menu4	=	ms.addMenu(document.getElementById("mainmenu4"));
menu4.addItem("德国大道",	"?action=news|dztx|2137|cn|4318|4303","_blank");
menu4.addItem("城市愿景",	"?action=news|dztx|2137|cn|4319|4303","_blank");
menu4.addItem("文 化",	"?action=news|dztx|2137|cn|4320|4303","_blank");
menu4.addItem("经 济",	"?action=news|dztx|2137|cn|4321|4303","_blank");
menu4.addItem("科学与教育",	"?action=news|dztx|2137|cn|4322|4303","_blank");

			mtDropDown.renderAll();
		}
		//��ʼ�˵�
		window.onload = init;