// From http://www.thought-after.com/free-tools/

var el="intro";
var bgimg=new Array("images/homeimage1.jpg", "images/homeimage2.jpg", "images/homeimage3.jpg", "images/homeimage4.jpg");
var random=Math.round((bgimg.length-1)*Math.random());var cssStr="#"+el+" { background: url("+bgimg[random]+") no-repeat top left } ";
var style=document.createElement("style");
style.setAttribute("type","text/css");
if(style.styleSheet){style.styleSheet.cssText=cssStr;}else{var cssText=document.createTextNode(cssStr);
style.appendChild(cssText);}document.getElementsByTagName("head")[0].appendChild(style);