var list= new Array()

if (window.location.href == "http://www.ta-architects.co.uk/ta/minishowcase/index.php")
{ image_directory = "../images/background/"; } 
else 
{ image_directory = "images/background/"; }

list[list.length]= image_directory + 'pic1.jpg';
list[list.length]= image_directory + 'pic2.jpg';
list[list.length]= image_directory + 'pic3.jpg';
list[list.length]= image_directory + 'pic4.jpg';
list[list.length]= image_directory + 'pic5.jpg';

j=parseInt(Math.random()*list.length);
j=(isNaN(j))?0:j;
document.body.background = list[j];