// JavaScript Document
var currImage = 0;
var images=new Array();
var numImages=5;
for(i=0; i<numImages; i++){
	t = i+1;
	images[i] = 'images/navigation/nav_'+t+'.jpg';
}
function swapNavBackgrounds(){
	if(currImage < numImages){
	} else {
		currImage = 0;
	}
	document.getElementById('leftColumn').style.backgroundImage = 'url('+images[currImage]+')';
	currImage++;
}

setInterval("swapNavBackgrounds()", 10000);