// JavaScript Document
function swbg() {

var state = "url("+img_ref+")";

if (document.all) { //IS IE 4 or 5 or 6
eval( "document.all." + layer_ref + ".style.backgroundImage = state");
}
if (document.layers) { //IS NETSCAPE 4 or below
document.layers[layer_ref].backgroundImage = state;
}
if (document.getElementById && !document.all) {
maxwell_smart = document.getElementById(layer_ref);
maxwell_smart.style.backgroundImage = state;

}
}