Event.onDOMReady(function() {

new Insertion.Bottom($("header"), "<a href=\"/survivorstories.ashx\" id=\"site-header-highlight\"></a>");
swfobject.embedSWF("/site/images/headers/home_survivors_header.swf", "site-header-highlight", "648", "248", "8.0.0", false, false, {wmode:"transparent"}, false);

var dir = "/site/images/headers/";
var arr = ["home1.jpg", "home2.jpg", "home3.jpg", "home4.jpg", "home5.jpg", "home6.jpg"];

// choose random number in range
var randomNum = function(low, high) { return Math.floor(Math.random() * (1 + high - low) + low); }

// choose random array value
var getRandom = function () { return arr[randomNum(0, arr.length - 1)]; }

// get random swf file
var imgFile = dir + getRandom();

$("header").style.backgroundImage = "url(" + imgFile + ")";
});