// JavaScript Document

function hideDiv(hide) {
	if (document.getElementById) {
		document.getElementById(hide).style.visibility = 'hidden';
	}
}

function showDiv(show) {
	if (document.getElementById) {
		document.getElementById(show).style.visibility = 'visible';
	}
} 

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

xo[0] = "01";
xo[1] = "02";
xo[2] = "03";
xo[3] = "04";
xo[4] = "05";
xo[5] = "06";
xo[6] = "07";
xo[7] = "08";
xo[8] = "09";
xo[9] = "10";
xo[10] = "11";
xo[11] = "12";
xo[12] = "13";
xo[13] = "14";
xo[14] = "15";
xo[15] = "16";
xo[16] = "17";
xo[17] = "18";
xo[18] = "19";
xo[19] = "20";
xo[20] = "21";
xo[21] = "22";

yo[0] = "01";
yo[1] = "02";
yo[2] = "03";
yo[3] = "04";
yo[4] = "05";
yo[5] = "06";
yo[6] = "07";

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

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

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