// JavaScript Document

function randOrd(){
  return (Math.round(Math.random())-0.5);
}

var xo = new Array();
var yo = new Array();

for (i=0; i<22; i++) {
	xo[i] = "0"+(i+1);
}

for (j=0; j<7; j++) {
	yo[j] = "0"+(j+1);
}

xo.sort(randOrd);
yo.sort(randOrd);

function setBg() {
	document.getElementById('bg1').style.backgroundImage = 'url(images/bg'+xo[0]+'.gif)';
	document.getElementById('bg2').style.backgroundImage = 'url(images/bg'+xo[0]+'.jpg)';
	document.getElementById('imgStrip').style.backgroundImage = 'url(images/image_strip_'+yo[0]+'.png)';
}