function wopen(url, name, w, h)
            {
              w += 32;
              h += 96;
              wleft = (screen.width - w) / 2;
              wtop = (screen.height - h) / 2;
              if (wleft < 0) {
                w = screen.width;
                wleft = 0;
              }
              if (wtop < 0) {
                h = screen.height;
                wtop = 0;
              }
              var win = window.open(url,
                name,
                'width=' + w + ', height=' + h + ', ' +
                'left=' + wleft + ', top=' + wtop + ', ' +
                'location=no, menubar=no, ');
                // +
                //'status=no, toolbar=no, scrollbars=no, resizable=yes');
              win.resizeTo(w, h);
              win.moveTo(wleft, wtop);
              win.focus();
            }