// JavaScript Document
//Edit this line to list all of your background images
var backgroundSrcs = new Array("Images/banner_top/banner_top.jpg","Images/banner_top/banner_top2.jpg", "Images/banner_top/banner_top3.jpg", "Images/banner_top/banner_top4.jpg")

function pickimage()
{
//This line picks an image at random from the list you entered above
var bgimage=backgroundSrcs[(Math.round(Math.random()*(backgroundSrcs.length-1)))]

//This line applies the background image to your masthead
document.getElementById("banner_top").style.background = "url('" + bgimage + "') left no-repeat #fffff0";
}