// JavaScript Document
window.onload = function() {
var back = ['img/pa.jpg','img/sc.jpg','img/wen.jpg','img/vita.jpg','img/rec.jpg','img/ye.jpg'];
if(document.getElementById('topAlternativeContent') != null)
{
document.getElementById('topAlternativeContent').style.backgroundImage =
'url(' + back[Math.floor(back.length * Math.random())] + ')';
}
}