var imagesrr = new Array("url(/images/home/backdrops/design-3.jpg)","url(/images/home/backdrops/lifestyle-2.jpg)","url(/images/home/backdrops/product-3.jpg)","url(/images/home/backdrops/product-3.jpg)");

var nav = document.getElementById('categorynav');
var currentBackground;

function nextBackground(){
	if (currentBackground == imagesrr.length-1) {
		currentBackground = 0;
	} else {
		currentBackground++;
	}
	return currentBackground;
}

function backgroundPreload(){
	tmp = new Array();
	for( i = 0; i < imagesrr.length; i++){
		tmp[i] = new Image();
		tmp[i].src = imagesrr[i];
	}
}

function changeBackground(){
	nav.style.backgroundImage = imagesrr[nextBackground()];
	return true;
}

currentBackground = 0 //imagesrr.indexOf(nav.style.backgroundImage);

backgroundPreload();
$ektron.timer(5000,function(timer){
	changeBackground();
	timer.reset(5000)
})