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

var	menu1	=	ms.addMenu(document.getElementById("mainmenu1"));
menu1.addItem("公司简介",	"?action=text|admin|785|cn|642|622","_blank");
menu1.addItem("我们的荣誉",	"?action=text|admin|785|cn|645|622","_blank");
menu1.addItem("愿景使命",	"?action=text|admin|785|cn|689|622","_blank");
var	menu2	=	ms.addMenu(document.getElementById("mainmenu2"));
menu2.addItem("HDIS高清模拟摄像机",	"?action=list|admin|785|cn|677|634","_blank");
menu2.addItem("HDCVI百万高清摄像机",	"?action=list|admin|785|cn|678|634","_blank");
menu2.addItem("SONY CCD系列模拟摄像机",	"?action=list|admin|785|cn|688|634","_blank");
menu2.addItem("高清网络摄像机",	"?action=list|admin|785|cn|679|634","_blank");
menu2.addItem("高清智能球型摄像机",	"?action=list|admin|785|cn|681|634","_blank");
menu2.addItem("照车牌摄像机",	"?action=list|admin|785|cn|690|634","_blank");
menu2.addItem("教学设备",	"?action=list|admin|785|cn|691|634","_blank");
menu2.addItem("网络摄像机",	"?action=list|admin|785|cn|696|634","_blank");
menu2.addItem("视频门禁",	"?action=list|admin|785|cn|697|634","_blank");
var	menu3	=	ms.addMenu(document.getElementById("mainmenu3"));
menu3.addItem("平安城市解决方案",	"?action=text|admin|785|cn|682|673","_blank");
menu3.addItem("公安安防系统解决方案",	"?action=text|admin|785|cn|683|673","_blank");
menu3.addItem("校车安全监管解决方案",	"?action=text|admin|785|cn|684|673","_blank");
menu3.addItem("平安校园安防解决方案",	"?action=text|admin|785|cn|685|673","_blank");
menu3.addItem("客运行业解决方案",	"?action=text|admin|785|cn|686|673","_blank");
menu3.addItem("通用行业解决方案",	"?action=text|admin|785|cn|687|673","_blank");

			mtDropDown.renderAll();
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		//��ʼ�˵�
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