// Top Navigation

	// Navigation control object
	var NAV = new Object();
	NAV.toString = function() {return "NAV [object]"};
	NAV.onover = function() {
		this.src = this.on;
	}
	NAV.onout = function() {
		this.src = this.off;
	}
	// Navigation preload
	NAV.onImgs = new Array();
	NAV.onImgs[0] = new Image();
	NAV.onImgs[0].src = "images/home-over.gif";
	NAV.onImgs[1] = new Image();
	NAV.onImgs[1].src = "images/overview-over.gif";
	NAV.onImgs[2] = new Image();
	NAV.onImgs[2].src = "images/curriculum-over.gif";
	NAV.onImgs[3] = new Image();
	NAV.onImgs[3].src = "images/people-over.gif";
	NAV.onImgs[4] = new Image();
	NAV.onImgs[4].src = "images/location-over.gif";
	NAV.onImgs[5] = new Image();
	NAV.onImgs[5].src = "images/apply-over.gif";
	NAV.onImgs[6] = new Image();
	NAV.onImgs[6].src = "images/for-patients-over.gif";
	NAV.init = function() {
		NAV.ref = document.getElementById("nav");
		NAV.links = NAV.ref.getElementsByTagName("a");
		NAV.imgs = NAV.ref.getElementsByTagName("img");
		var current = document.body.id;
		for (var i = 0; i < NAV.imgs.length; i++) {
			var img = NAV.imgs[i];
			if (img.id == current) {
				img.src = NAV.onImgs[i].src.replace("-over", "-on");
			}
			else {
				img.off = img.src;
				img.on = NAV.onImgs[i].src;
				img.onmouseover = NAV.onover;
				img.onmouseout = NAV.onout;
			}
		}

	}
	// send init function to MAIN for window.onload
	MAIN.subscribeInit(NAV.init, NAV);