// JavaScript Document

window.onload = initImages;

var imagepos = 1;
var myarray = [];

function initImages(){
	
	//preload all the images
	var images = document.getElementById('alternatecontent').src;
	var reg = new RegExp(/\d{1,3}\.jpg/g);
	
	
	
	
	
	for(var i=1; i<=3; i++){
		
		var findextension = images.match(reg);
		//alert('found exp: '+findextension);
		var preloadimage = images.replace(findextension,i+'.jpg');
		//alert('preloadimage: '+preloadimage);
		myarray[i] = preloadimage;
		//alert('Container: '+myarray[i]);
		
		};
	
	
		var callimages = window.setInterval("changeimage()",8000);
	};
	
function changeimage(){
	imagepos++;
	//alert(imagepos);
	if(imagepos>=4){
		imagepos = 1;
		//alert('done');
	}
	var newimage = myarray[imagepos];
	var applychange = document.getElementById('alternatecontent').src = newimage;
	//alert(document.getElementById('alternatecontent').src);
		
	}