// background changer 

function setPic2() {  
   var picHold2 = document.getElementById("bannerEducation");  
   var pics2 = new Array("banner_ed_bg_01.gif", 
                         "banner_ed_bg_02.gif",
                         "banner_ed_bg_03.gif",
                         "banner_ed_bg_04.gif");
   var choose = Math.floor(Math.random()* pics2.length);  
   picHold2.style.background=" url("+'../../images/'+pics2[choose]+") no-repeat";
} 
 
function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

addLoadEvent(setPic2);