<!-- 
if (document.getElementById) { window.onload = swap };

function swap() {
	
var numimages=7;
rndimg = new Array("/images/home/filler_pic.jpg","/images/home/filler_pic_1.jpg","/images/home/filler_pic_2.jpg","/images/home/filler_pic_3.jpg","/images/home/filler_pic_4.jpg","/images/home/filler_pic_5.jpg","/images/home/filler_pic_courses.jpg"); 
x=(Math.floor(Math.random()*numimages));
randomimage=(rndimg[x]);
document.getElementById("main_img").style.backgroundImage = "url("+ randomimage +")"; 


var rn = Math.floor(Math.random()*5) //random number between 0->4
var id;

if(rn==0){
 id = "zero";
}
if(rn==1){
 id = "one";
}
if(rn==2){
 id = "two";
}
if(rn==3){
 id = "three";
}
if(rn==4){
 id = "four";
}
if(rn==5){
 id = "five";
}


document.getElementById(id).style.display = 'block'; //could also do 'inline'


}
//-->