//Edit this line to list all of your background images
var backgroundSrcs = new Array("/sites/JGP4_132/images/bottomswoosh1.jpg","/sites/JGP4_132/images/bottomswoosh2.jpg","/sites/JGP4_132/images/bottomswoosh3.jpg","/sites/JGP4_132/images/bottomswoosh4.jpg","/sites/JGP4_132/images/bottomswoosh5.jpg","/sites/JGP4_132/images/bottomswoosh6.jpg","/sites/JGP4_132/images/bottomswoosh7.jpg","/sites/JGP4_132/images/bottomswoosh8.jpg","/sites/JGP4_132/images/bottomswoosh9.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("body").style.backgroundImage = "url('" + bgimage + "')";
}