function sh (what)
{
if (document.getElementById)
{
w=document.getElementById(what);
if (w.style.display == "none") { w.style.display = "block";}
else  { w.style.display = "none";}
}
}

function noweokno(adres,okno,w,h,s) {
var left = (screen.availWidth-w)/2;
var top = (screen.availHeight-h)/2;
link = window.open(adres,okno,"toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars="+s+",resizable=0,width="+w+",height="+h+",left="+left+",top="+top);
}


function open_image(path,title,xx,yy)
{
open('image.php?path='+path, ''+title, 'status=yes,width='+xx+', height='+yy+',scrollbars=no,resizable=0');
}

function otworz(link)
{
if (window.nowe_okno && nowe_okno.open && !nowe_okno.closed) {nowe_okno.close();}
nowe_okno=window.open(""+link,'', 'toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=no,resizable=no,fullscreen=no,channelmode=no,width=500,height=500,top=0,left=100');
nowe_okno.focus();
}


function otworz_s(link)
{
if (window.nowe_okno && nowe_okno.open && !nowe_okno.closed) {nowe_okno.close();}
nowe_okno=window.open(""+link,'', 'toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,resizable=no,fullscreen=no,channelmode=no,width=500,height=500,top=0,left=100');
nowe_okno.focus();
}


function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function chImg() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = true;

function preloadImages() {
	if (document.images) {
menu_off = newImage("img/menu.gif");
menu_on  = newImage("img/menu1.gif");
		preloadFlag = true;
	}
}