var theImages=['TopPic-01', 'TopPic-02', 'TopPic-03', 'TopPic-04', 'TopPic-05', 'TopPic-06', 'TopPic-07', 'TopPic-08', 'TopPic-09', 'TopPic-10', 'TopPic-11', 'TopPic-12', 'TopPic-13', 'TopPic-14'];
var p = theImages.length;
var whichImage = Math.round(Math.random()*(p-1));
onload=function() {
document.getElementById('swap').style.background="url(http://www.pdcproductions.com/images/Random/"+theImages[whichImage]+".jpg) no-repeat";
}