function setSidebarBg(){
function bkgrnd() {}; 
bg = new bkgrnd () ;
var topCap = document.getElementById("top-cap");
if(topCap){
n = 0 ;
bg[n++] = "url('images/sidebar-top-man.gif') center no-repeat"; 
bg[n++] = "url('images/sidebar-top-woman.gif') center no-repeat";
bg[n++] = "url('images/sidebar-top-woman2.gif') center no-repeat"; 
bg[n++] = "url('images/sidebar-top-briefcase.gif') center no-repeat";
bg[n++] = "url('images/sidebar-top-default.gif') center no-repeat"; 
rnd = Math.floor(Math.random() * n) ;
topCap.style.background=bg[rnd];
};
};
window.onload = function(){
setSidebarBg();
};