// JavaScript Document

//	Version 1
function changeDivImage()
{
    document.getElementById("header").style.backgroundImage = "url(images/top_bck_5.jpg)";
}
function restoreDivImage()
{
    document.getElementById("header").style.backgroundImage = "url(images/top_bck_1.jpg)";
}


//	Version 3
var images = new Array();
images[0] = "images/top_bck_1.jpg"; 
images[1] = "images/top_bck_2.jpg";
images[2] = "images/top_bck_3.jpg";
images[3] = "images/top_bck_4.jpg";
images[4] = "images/top_bck_5.jpg";
images[5] = "images/top_bck_6.jpg";

function ShowImg1() {
	var number = images.length;
	var increment = Math.floor(Math.random() * number);
	var strTemp =images[increment];
	document.getElementById("header").style.background='url('+strTemp+')';
}