sfHover = function() {
	var sfEls = document.getElementById("top_menu").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}

if (window.attachEvent) window.attachEvent("onload", sfHover);

/////////////////////////////////////////////////////////////

var interval = 5; // delay between rotating images (in seconds)
var random_display = 0; // 0 = no, 1 = yes
interval *= 1000;

var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("http://www.uchealth.com.au/sawmh/templates/standrews/images/intro_1.jpg");
image_list[image_index++] = new imageItem("http://www.uchealth.com.au/sawmh/templates/standrews/images/intro_2.jpg");
image_list[image_index++] = new imageItem("http://www.uchealth.com.au/sawmh/templates/standrews/images/intro_3.jpg");
image_list[image_index++] = new imageItem("http://www.uchealth.com.au/sawmh/templates/standrews/images/intro_4.jpg");
image_list[image_index++] = new imageItem("http://www.uchealth.com.au/sawmh/templates/standrews/images/intro_5.jpg");
image_list[image_index++] = new imageItem("http://www.uchealth.com.au/sawmh/templates/standrews/images/intro_6.jpg");
var number_of_image = image_list.length;

function imageItem(image_location) {
	this.image_item = new Image();
	this.image_item.src = image_location;
}

function get_ImageItemLocation(imageObj) {
	return(imageObj.image_item.src)
}

function generate(x, y) {
	var range = y - x + 1;
	return Math.floor(Math.random() * range) + x;
}

function getNextImage() {
	if (random_display) {
		image_index = generate(0, number_of_image-1);
	}
	else {
		image_index = (image_index+1) % number_of_image;
	}
	
	var new_image = get_ImageItemLocation(image_list[image_index]);
	return(new_image);
}

function rotateImage(place) {
	var new_image = getNextImage();
	document[place].src = new_image;
	var recur_call = "rotateImage('"+place+"')";
	setTimeout(recur_call, interval);
}