function init() {
			if (mtDropDown1.isSupported()) {
				mtDropDown1.initialize();
				menu1.onactivate = function() { swapImage("button1", preloaded[1][1].src) };
				menu1.ondeactivate = function() { swapImage("button1", preloaded[1][0].src) };
			}

			if (mtDropDown2.isSupported()) {
				mtDropDown2.initialize();
				menu2.onactivate = function() { swapImage("button2", preloaded[2][1].src) };
				menu2.ondeactivate = function() { swapImage("button2", preloaded[2][0].src) };
			}
			if (mtDropDown3.isSupported()) {
				mtDropDown3.initialize();
				menu3.onactivate = function() { swapImage("button3", preloaded[3][1].src) };
				menu3.ondeactivate = function() { swapImage("button3", preloaded[3][0].src) };

			}


		}

		// this is a crappy example preloader. Use whichever one you want.
		function loadImage(sFilename) {
			var img = new Image();
			img.src = sFilename;
			return img;
		}

		// this is a crappy example image swapper. Use whichever you want.
		function swapImage(imgName, sFilename) {
			document.images[imgName].src = sFilename;
		}