var imagesloaded = 0
var selected = 0
function preloadimages() {
if (parseInt(navigator.userAgent.substring(8,9)) >= 3) {
	nav = new Array(4);
	nav[1]=new Image(128, 30);
	nav[1].src = "images/bar_about.gif";
	nav[2]=new Image(125, 30);
	nav[2].src = "images/bar_message.gif";
	nav[3]=new Image(127, 30);
	nav[3].src = "images/bar_physican.gif";
	nav[4]=new Image(129, 30);
	nav[4].src = "images/bar_news.gif";
	nav[5]=new Image(129, 30);
	nav[5].src = "images/bar_patient.gif";
	
	navh = new Array(4);
	navh[1]=new Image(128, 30);
	navh[1].src = "images/bar_about-over.gif";
	navh[2]=new Image(125, 30);
	navh[2].src = "images/bar_message-over.gif";
	navh[3]=new Image(127, 30);
	navh[3].src = "images/bar_physican-over.gif";
	navh[4]=new Image(129, 30);
	navh[4].src = "images/bar_news-over.gif";
	navh[5]=new Image(129, 30);
	navh[5].src = "images/bar_patient-over.gif";
	
	imagesloaded = 1
	}
	}
	function hilite (name, num) {
	if (imagesloaded == 1) {
	if (selected != num) {
 	document.images[name].src = navh[num].src
 	}
 	}
	}
	function lowlite (name, num) {
	if (imagesloaded == 1) {
	if (selected != num) {
 	document.images[name].src = nav[num].src
 	}
	}
	}