app = navigator.appName;
	ver = navigator.appVersion;
	mac = ver.indexOf("Macintosh") > 0;
	win = ver.indexOf("Win") > 0;
	vnum = parseFloat(ver);

	good = (((app == "Netscape") && (vnum >= 3 )) || ((mac) && (app == "Microsoft Internet Explorer") && (vnum >= 3.01 )) || ((win) && (app == "Microsoft Internet Explorer") && (vnum >= 4)))
	function changeImage(ImageToChange, ImageToShow) {
		if(good) {
			if (document.images) {
				document[ImageToChange].src = ImageToShow;
			}
		}
	}

	function preload() {
		var the_images = new Array(
		'images/oc_careers_up.gif',
		'images/oc_execbios_up.gif',
		'images/oc_overview_up.gif',
		'images/os_brokerage_up.gif',
		'images/os_investment_up.gif',
		'images/os_overview_up.gif',
		'images/or_research_up.gif',
		'images/or_media_up.gif',
		'images/or_overview_up.gif');
		
		preloadImages(the_images);
	}

	function preloadImages(the_images_array) {
		for(loop=0; loop < the_images_array.length; loop++) {
			var an_image = new Image();
			an_image.src = the_images_array[loop];
		}
	}

	preload();