bgimg = new Array (
'common/images/bg/01.jpg',
'common/images/bg/02.jpg',
'common/images/bg/03.jpg',
'common/images/bg/04.jpg',
'common/images/bg/05.jpg',
'common/images/bg/06.jpg',
'common/images/bg/07.jpg',
'common/images/bg/08.jpg');

bgcol = new Array (
'272e33',
'223366',
'5f626e',
'9d98b8',
'383e61',
'161b3c',
'37467a',
'334499');

bgcopy = new Array (
'/common/images/bg/copy01.gif',
'/common/images/bg/copy02.gif',
'/common/images/bg/copy03.gif',
'/common/images/bg/copy04.gif',
'/common/images/bg/copy05.gif',
'/common/images/bg/copy06.gif',
'/common/images/bg/copy07.gif',
'/common/images/bg/copy08.gif');

cookies = document.cookie.split("; ");
var i = 0;
var bgArray = -1;
while (i<cookies.length) {
	if (cookies[i].indexOf("bg=")==0) {
		bgArray = i;
		break;
	} else {
		i++;
	}
}

function bgChg() {
	if (document.cookie && bgArray>=0) {
		getBg();
	} else {
		setBg();
	}
}

function setBg() {
	chip = Math.floor(bgimg.length * Math.random());
	document.body.background = baseurl + bgimg[chip];
	document.body.style.backgroundColor = "#" + bgcol[chip];
	document.getElementById("bgcopy").innerHTML = "<img src='" + bgcopy[chip] + "' width='450' height='15' alt='' />";
	document.cookie = "bg=" + chip + "; path=/";
}

function getBg() {
	pos = cookies[bgArray].indexOf("=");
	chip = cookies[bgArray].substring(pos+1, cookies[bgArray].length);
	document.body.background = baseurl + bgimg[chip];
	document.body.style.backgroundColor = "#" + bgcol[chip];
	document.getElementById("bgcopy").innerHTML = "<img src='" + bgcopy[chip] + "' width='450' height='15' alt='' />";
}

try {
	window.addEventListener("load",bgChg,false);
} catch (e) {
	window.attachEvent("onload",bgChg);
}