function zamen(nazov_obr,novy_obr)
    { document.images[nazov_obr].src=novy_obr; }

    function NewWindow(page, name, w, h, scroll) {
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable';
	win = window.open(page, name, winprops);
	if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
    }

    // otevri nove okno
    function JSL(url, jmeno, w, h) 
    {
    popupWin = window.open(url, jmeno, 'resizable=0,top=100,left=100,scrollbars=no,width=' + w + ',height=' + h);
    }
    //