function mouseOver(obj) {
	if (!bLoaded) return false;
	var sPath = obj.src.substring( 0, obj.src.lastIndexOf('/') +1 );
	var sImg = obj.src.substring(obj.src.lastIndexOf('/') +1, obj.src.lastIndexOf('.'));
	var sExt = obj.src.substring(obj.src.lastIndexOf('.') +1, obj.src.length);
	if(sImg.indexOf('_on') == -1) obj.src = sPath + sImg + "_on." + sExt;
}

function mouseOut(obj) {
	if (!bLoaded) return false;
	var sPath = obj.src.substring( 0, obj.src.lastIndexOf('/') +1 );
	var sImg = obj.src.substring(obj.src.lastIndexOf('/') +1, obj.src.lastIndexOf('.'));
	var sExt = obj.src.substring(obj.src.lastIndexOf('.') +1, obj.src.length);
	if(sImg.indexOf('_on') != -1) obj.src = sPath + sImg.replace('_on', '') + "." + sExt;
}

function setView(img,path) {
	img.src = path;
}

Array.prototype.inArray = function (value) {
    var i;
    for (i=0; i < this.length; i++) {
        if (this[i] == value) {
            return true;
        }
    }
    return false;
};

function getRand(range) {
	return Math.floor(Math.random()*range);
}


function getRandomSeries(length, range) {
	var series = new Array();
	var rand = null;
	for(var i=0 && series.length <= 3; i<100; i++) {
		rand = getRand(range);
		if(!series.inArray(rand)) {
			series[series.length] = rand;
		}
	}
	return series;
}

function init() {

	// primary nav
	var cNav = document.getElementById('utility-nav').getElementsByTagName('IMG');
	for(var i=0; i<cNav.length; i++) {
		cNav[i].onmouseover = function() { mouseOver(this) }
		cNav[i].onmouseout = function() { mouseOut(this) }		
	}

	// local images in the body content that should rollover
	var oRollovers = document.getElementById('main').getElementsByTagName('IMG') || false;
	for(var k=0; k<oRollovers.length; k++) {
		if(oRollovers[k].className == 'rollover') {
			if(oRollovers[k].src.indexOf('_on')!=-1) continue;
			oRollovers[k].onmouseover = function() { mouseOver(this) }
			oRollovers[k].onmouseout = function() { mouseOut(this) }
		}
	}	
	
	bLoaded = true;
}

window.onload = init;

// written by Dean Edwards, 2005
// with input from Tino Zijdel

// http://dean.edwards.name/weblog/2005/10/add-event/

function addEvent(element, type, handler) {
	// assign each event handler a unique ID
	if (!handler.$$guid) handler.$$guid = addEvent.guid++;
	// create a hash table of event types for the element
	if (!element.events) element.events = {};
	// create a hash table of event handlers for each element/event pair
	var handlers = element.events[type];
	if (!handlers) {
		handlers = element.events[type] = {};
		// store the existing event handler (if there is one)
		if (element["on" + type]) {
			handlers[0] = element["on" + type];
		}
	}
	// store the event handler in the hash table
	handlers[handler.$$guid] = handler;
	// assign a global event handler to do all the work
	element["on" + type] = handleEvent;
};
// a counter used to create unique IDs
addEvent.guid = 1;

function removeEvent(element, type, handler) {
	// delete the event handler from the hash table
	if (element.events && element.events[type]) {
		delete element.events[type][handler.$$guid];
	}
};

function handleEvent(event) {
	var returnValue = true;
	// grab the event object (IE uses a global event object)
	event = event || fixEvent(window.event);
	// get a reference to the hash table of event handlers
	var handlers = this.events[event.type];
	// execute each event handler
	for (var i in handlers) {
		this.$$handleEvent = handlers[i];
		if (this.$$handleEvent(event) === false) {
			returnValue = false;
		}
	}
	return returnValue;
};

function fixEvent(event) {
	// add W3C standard event methods
	event.preventDefault = fixEvent.preventDefault;
	event.stopPropagation = fixEvent.stopPropagation;
	return event;
};
fixEvent.preventDefault = function() {
	this.returnValue = false;
};
fixEvent.stopPropagation = function() {
	this.cancelBubble = true;
};