var preloaded = [];


		
			preloaded[1] = [loadImage("btn-who_we_are-off.gif"), loadImage("btn-who_we_are-on.gif")];
		
			preloaded[2] = [loadImage("btn-what_we_do-off.gif"), loadImage("btn-what_we_do-on.gif")];
		
			preloaded[3] = [loadImage("btn-clients-off.gif"), loadImage("btn-clients-on.gif")];
		
			preloaded[4] = [loadImage("btn-our_work-off.gif"), loadImage("btn-our_work-on.gif")];
		


		function init() {
			// whatever stuff you need to do onload goes here.

			//==========================================================================================
			// if supported, initialize mtdropdowns
			//==========================================================================================
			// Check isSupported() so that menus aren't accidentally sent to non-supporting browsers.
			// This is better than server-side checking because it will also catch browsers which would
			// normally support the menus but have javascript disabled.
			//
			// If supported, call initialize() and then hook whatever image rollover code you need to do
			// to the .onactivate and .ondeactivate events for each menu.
			//==========================================================================================
			if (mtDropDown.isSupported()) {
				mtDropDown.initialize();

				// hook all the image swapping of the main toolbar to menu activation/deactivation
				// instead of simple rollover to get the effect where the button stays hightlit until
				// the menu is closed.
				menu1.onactivate = function() { swapImage("button1", preloaded[1][1].src) };
menu1.ondeactivate = function() { swapImage("button1", preloaded[1][0].src) };
menu2.onactivate = function() { swapImage("button2", preloaded[2][1].src) };
menu2.ondeactivate = function() { swapImage("button2", preloaded[2][0].src) };
menu4.onactivate = function() { swapImage("button4", preloaded[4][1].src) };
menu4.ondeactivate = function() { swapImage("button4", preloaded[4][0].src) };

			}
		}

		// this is a crappy example preloader. Use whichever one you want.
		function loadImage(sFilename) {
			var img = new Image();
			img.src ="http://www.srg.com/resources/img/nav/" + sFilename;
			return img;
		}

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

		function newImage(arg) {
			if (document.images) {
				rslt = new Image();
				rslt.src = arg;
				return rslt;
			}
		}
		
		function changeImages() {
			if (document.images && (preloadFlag == true)) {
				for (var i=0; i<changeImages.arguments.length; i+=2) {
					document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
				}
			}
		}