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=/";
}
days=0;
nomCookie="screenXY";
sizeX=screen.width;
sizeY=screen.height;
size=sizeX+' '+sizeY;
createCookie(nomCookie,size,days);