function displayWindow(url, width, height) {
    var Win = window.open(url,"displayWindow",'width=' + width + ',height=' + height + ',resizable=0, scrollbars=yes, menubar=no' );
}


function okienko(url,width,height,sb,top,left){ 
	window.open(url,'okienko','align=center,location=0,toolbar=0,status=0,location=0,directories=0,resizable=0,scrollbars='+sb+',width='+width+',height='+height+',top='+top+',left='+left+',menubar=no')
}

function otworz(AId) {
        if (!document.getElementById) {
            return null;
        }
        elem = document.getElementById(AId);
        if (elem) {
            if (elem.style.display = 'none')
                        elem.style.display = 'block';
                        elem.style.visibility = 'visible';
        }
    }
   
    function zamknij(AId) {
        if (!document.getElementById) {
            return null;
        }
        elem = document.getElementById(AId);
        if (elem) {
            if (elem.style.display != 'none')
                elem.style.display = 'none';
                elem.style.visibility = 'hidden';
            }
    }