NS4 = (document.layers);
	     IE4 = (document.all);
	    ver4 = (NS4 || IE4);
		 IE5 = (IE4 && navigator.appVersion.indexOf("5.")!=-1);
	   isMac = (navigator.appVersion.indexOf("Mac") != -1);
	  isMenu = (NS4 || (IE4 && !isMac) || (IE5 && isMac));
	
		function popUp(){return};
		function popDown(){return};
		
		if (!ver4) event=null;	
		
		pre_dir = "";
		
		
		hasFlash = 0;

		function init() {
			if (!NS4/*&& mtDropDown.isSupported()*/) {
				mtDropDown.initialize();
			}
		}

		function loadImage(sFilename) {
			var img = new Image();
			img.src ="/images/nav/" + sFilename;
			return img;
		}

		function swapImage(imgName, sFilename) {
			document.images[imgName].src = sFilename;
		}