// random background image



if (document.getElementById) { window.onload = swap };
function swap() {
var numimages=6;
rndimg = new Array("http://www.campbellsmithandco.co.uk/wordpress/images/banners/banner1.jpg","http://www.campbellsmithandco.co.uk/wordpress/images/banners/banner2.jpg","http://www.campbellsmithandco.co.uk/wordpress/images/banners/banner3.jpg","http://www.campbellsmithandco.co.uk/wordpress/images/banners/banner4.jpg","http://www.campbellsmithandco.co.uk/wordpress/images/banners/banner5.jpg","http://www.campbellsmithandco.co.uk/wordpress/images/banners/banner6.jpg"); 
x=(Math.floor(Math.random()*numimages));
randomimage=(rndimg[x]);
document.getElementById("banner").style.backgroundImage = "url("+ randomimage +")"; 
}