function displayWindow(url, width, height, szerokosc, wysokosc)
{
        LeftPosition=(screen.width)?(screen.width-szerokosc)/2:100;
     TopPosition=(screen.height)?(screen.height-wysokosc)/2:100;
        var Win = window.open(url,0,'width=' + width + ',height=' + height + ',top='+TopPosition+',left='+LeftPosition+',resizable=0,scrollbars=yes,menubar=no,toolbar=no,status=no')
}