var backgroundFiles = new Array(
	'/images/global/backgrounds/dembicki-shark.gif',
	'/images/global/backgrounds/remington-linework.gif',
	'/images/global/backgrounds/troyallen-girlwarrior.gif',
	'/images/global/backgrounds/rsimms-girlninja.gif',
	'/images/global/backgrounds/cpiers-war.gif',
	'/images/global/backgrounds/mjones-krumpus.gif',
	'/images/global/backgrounds/swhite-crack.gif'
);
var rand = Math.floor(Math.random() * backgroundFiles.length);
document.getElementById('contentContainer').style.backgroundImage = "url("+ backgroundFiles[rand]+")";