function findPos(obj) {
	var curtop = 0;
	var curleft = 0;
	if (obj.offsetParent) {
		do {
			curleft += obj.offsetLeft;
			curtop += obj.offsetTop;
		} while (obj = obj.offsetParent);
	}
	return [curleft,curtop];
}

function footerHeight()
{
	//heightContent = document.getElementById('container').offsetHeight;
	positionFooter = findPos(document.getElementById('bottom'));
	footerTop = positionFooter[1];
	heightFooter = document.getElementById('bottom').offsetHeight;
	wysokosc_okna = document.body.clientHeight;	
	
	if (footerTop + heightFooter < wysokosc_okna) {
		wysokosc_stopki = wysokosc_okna - footerTop - heightFooter;
		document.getElementById('bottomEnd').style.height = wysokosc_stopki+'px';
	}
}