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];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		mcnav_02_over = newImage("../nav/mcnav_02-over.gif");
		mcnav_03_over = newImage("../nav/mcnav_03-over.gif");
		mcnav_04_over = newImage("../nav/mcnav_04-over.gif");
		mcnav_05_over = newImage("../nav/mcnav_05-over.gif");
		mcnav_06_over = newImage("../nav/mcnav_06-over.gif");
		mcnav_07_over = newImage("../nav/mcnav_07-over.gif");
		mcnav_09_over = newImage("../nav/mcnav_09-over.gif");
		mcnav_10_over = newImage("../nav/mcnav_10-over.gif");
		mcnav_11_over = newImage("../nav/mcnav_11-over.gif");
		preloadFlag = true;
	}
}

function popEvent(url){
        var popWidth = (window.screen.width/2) - (235 + 155);
        var popHeight = (window.screen.height/2) - (185 - 10); 
        
        //alert ( "w = " + popWidth + " and h = " + popHeight )

var popEvent=window.open(url,"event","toolbar=0,location=0,directories=0,status=0,menubar=0,resizable=0,width=470,height=370,left=" + popWidth + ",top=" + popHeight + ",screenX=" + popWidth + ",screenY=" + popHeight + ",scrollbars=YES");

}

<!-- Begin

var theImages = new Array()

theImages[0] = 'random/01.jpg'
theImages[1] = 'random/02.jpg'
theImages[2] = 'random/03.jpg'
theImages[3] = 'random/04.jpg'
theImages[4] = 'random/05.jpg'
theImages[5] = 'random/06.jpg'
theImages[6] = 'random/07.jpg'
theImages[7] = 'random/08.jpg'

var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}
var whichImage = Math.round(Math.random()*(p-1));
function showImage(){
document.write('<img src="'+theImages[whichImage]+'">');
}

//  End -->