<!--
//dropdown_initialize.js
		var preloaded = [];

		for (var i = 1; i <= 7; i++) {
			preloaded[i] = [loadImage("/images/"+i + "_1.jpg"), loadImage("/images/"+i + ".jpg")];		//设置图片的OnMouseOver和OnMouseOut的路径
		}

		function init() {

			if (mtDropDown.isSupported()) {
				mtDropDown.initialize();
				

		menu1.onactivate = function() { swapImage("b1", preloaded[1][1].src) };
		menu1.ondeactivate = function() { swapImage("b1", preloaded[1][0].src) };

menu2.onactivate = function() { swapImage("b2", preloaded[2][1].src) };
menu2.ondeactivate = function() { swapImage("b2", preloaded[2][0].src) };

menu3.onactivate = function() { swapImage("b3", preloaded[3][1].src) };
menu3.ondeactivate = function() { swapImage("b3", preloaded[3][0].src) };

				menu4.onactivate = function() { swapImage("b4", preloaded[4][1].src) };
			menu4.ondeactivate = function() { swapImage("b4", preloaded[4][0].src) };

			menu5.onactivate = function() { swapImage("b5", preloaded[5][1].src) };
			menu5.ondeactivate = function() { swapImage("b5", preloaded[5][0].src) };

			menu6.onactivate = function() { swapImage("b6", preloaded[6][1].src) };
				menu6.ondeactivate = function() { swapImage("b6", preloaded[6][0].src) };

			menu7.onactivate = function() { swapImage("b7", preloaded[7][1].src) };
			menu7.ondeactivate = function() { swapImage("b7", preloaded[7][0].src) };
				
		
			}
		}

		function loadImage(sFilename) {
			var img = new Image();
			img.src ="" + sFilename;
			return img;
		}

		function swapImage(imgName, sFilename) {
			document.images[imgName].src = sFilename;
		}
//-->