function stopka() {
	offsetYStopki = document.getElementById('stopka').offsetTop;
	wysokoscOkna = document.body.clientHeight;
	wysokoscStopki = document.getElementById('stopka').offsetHeight;
	wysokoscStrony = wysokoscOkna - wysokoscStopki;
	wskaznikStrony = document.getElementById('strona').style;
	if (offsetYStopki < wysokoscStrony) wskaznikStrony.height = wysokoscStrony + "px";
}

function zdjecie(src) {
	window.open("zdjecie.php?p="+src,'','width=700, height=525, top=10, left=10, resizable=yes, scrollbars=no, toolbars=no, status=yes');
}

IS_LOADED =  false;

function preload() {
	//document.getElementById('doZaladowania').style.display = 'none';
	if (!IS_LOADED) {
		document.getElementById('doZaladowania').style.visibility = 'hidden';
		document.getElementById('preloader').style.display = 'block';
	}
}

function load_end() {
	IS_LOADED = true;
	document.getElementById('doZaladowania').style.visibility = 'visible';
	document.getElementById('preloader').style.display = 'none';
	document.getElementById('preloader').style.visibility = 'hidden';
}

function mp3player()
{
	var left, top, x, y;
	x = 360;
	y = 270;
	left = Math.round((screen.width - x) / 2);
	top = Math.round((screen.height - y) / 2);
	window.open('files/MP3Player.html','','width='+x+', height='+y+', top='+top+', left='+left+', resizable=no, scrollbars=no, menubar=no, status=no').focus();	
}