var backgroundimages=new Array();
	backgroundimages[0]="/sites/all/themes/heaven/images/logo-1.png";
	backgroundimages[1]="/sites/all/themes/heaven/images/logo-2.png";	
    backgroundimages[2]="/sites/all/themes/heaven/images/logo-3.png";	
	backgroundimages[3]="/sites/all/themes/heaven/images/logo-4.png";
	backgroundimages[4]="/sites/all/themes/heaven/images/logo-5.png";	
	backgroundimages[5]="/sites/all/themes/heaven/images/logo-6.png";	
	backgroundimages[6]="/sites/all/themes/heaven/images/logo-7.png";	
					

	function random_logo_image(){
	  var index = Math.floor(Math.random() * backgroundimages.length);
	  document.getElementsByClassName("logo")[0].style.backgroundImage="url("+backgroundimages[index]+")";	 
	}