var theImages=new Array(); 
theImages[0]="images/homeimg-sm-2.jpg"; 
theImages[1]="images/homeimg-sm-3.jpg"; 
theImages[2]="images/homeimg-sm-5.jpg";


function randomimage() { 
var j = 0
var p = theImages.length;
var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image()
   preBuffer[i].src = theImages[i]
}
var whichImage = Math.round(Math.random()*(p-1));
if(document.getElementById('random') != null)
	document.getElementById('random').src = theImages[whichImage];
}