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

var	menu3	=	ms.addMenu(document.getElementById("mainmenu3"));
menu3.addItem("为什么需要免费通",	"/index.php/text/mft/1/cn/178/2.html","");
menu3.addItem("应用领域",	"/index.php/text/mft/1/cn/180/2.html","");
menu3.addItem("免费通优势和特点",	"/index.php/text/mft/1/cn/181/2.html","");
menu3.addItem("免费通的开通和服务",	"/index.php/text/mft/1/cn/182/2.html","");
menu3.addItem("如何使用免费通",	"/index.php/text/mft/1/cn/183/2.html","");

			mtDropDown.renderAll();
		}
		//初始菜单
		window.onload = init;