bg = new Array(2); 
bg[0] = 'http://www.deyicpa.com/images/visualize-01.gif'  
bg[1] = 'http://www.deyicpa.com/images/visualize-02.gif' 
index = Math.floor(Math.random() * bg.length);
document.write("<style>#huerreson{background-image:url("+bg[index]+");background-position: right bottom;}</style>");