var Uly = {
	w: 0,
	h: 0,
	bgw:781,
	bgh:502,
	siteRoot: undefined,
	currentId:undefined,
	init: function(){
		Uly.h = document.viewport.getHeight();
		Uly.w = document.viewport.getWidth();
		var bgPosX = (Uly.w < Uly.bgw)? 0 : Math.floor(Math.random()*(Uly.w-Uly.bgw));
		var bgPosY = (Uly.h < Uly.bgh)? 0 : Math.floor(Math.random()*(Uly.h-Uly.bgh));
		document.body.style.backgroundPosition = bgPosX+'px '+bgPosY+'px';
	}
};
Event.observe(window,"load",Uly.init);

function createCookie(name,value,days){
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}