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

var	menu3	=	ms.addMenu(document.getElementById("mainmenu3"));
menu3.addItem("滚珠丝杆",	"?action=list|jinggong|92367|cn|20405|2","_blank");
menu3.addItem("联轴器",	"?action=list|jinggong|92367|cn|20406|2","_blank");
menu3.addItem("微型轴承",	"?action=list|jinggong|92367|cn|20407|2","_blank");
menu3.addItem("YRT转台轴承",	"?action=text|jinggong|92367|cn|20408|2","_blank");
menu3.addItem("交叉滚子轴承",	"?action=list|jinggong|92367|cn|20409|2","_blank");
menu3.addItem("推力圆柱滚子轴承",	"?action=text|jinggong|92367|cn|20410|2","_blank");
menu3.addItem("直线轴承系列",	"?action=list|jinggong|92367|cn|20411|2","_blank");
menu3.addItem("法兰式直线轴承系列",	"?action=list|jinggong|92367|cn|20412|2","_blank");
menu3.addItem("直线轴承箱式单元",	"?action=list|jinggong|92367|cn|20413|2","_blank");
menu3.addItem("杆端关节轴承",	"?action=text|jinggong|92367|cn|20414|2","_blank");

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