window.addEventListener?window.addEventListener('load',function()
{
ray.rand('thisCell');
},false):
window.attachEvent('onload',function()
{
ray.rand('thisCell');
}); // FF : IE1

var ray=
{
bgArr:['url(/images/au0037.jpg)','url(/images/nc0015.jpg)','url(/images/nc0024.jpg)','url(/images/nc0084.jpg)','url(/images/nz0075.jpg)','url(/images/nz0110.jpg)','url(/images/nz0115.jpg)','url(/images/nz0275.jpg)','url(/images/nz0276.jpg)','url(/images/nz0284.jpg)','url(/images/nz0456.jpg)','url(/images/nz1193.jpg)','url(/images/nz1196.jpg)','url(/images/nz1318.jpg)','url(/images/to0161.jpg)','url(/images/to0254.jpg)','url(/images/to0322.jpg)','url(/images/to0388.jpg)'], 
rand:function(el)
{
var num = Math.floor(Math.random()*this.bgArr.length);
this.getID(el).style.background=this.bgArr[num];
},
getID:function(el){return document.getElementById(el);}
}