function openWindow(theURL,winName,width,height,features) { //v3.1
    var window_width  = width;
    var window_height = height;
    var newfeatures   = features;
    var window_top    = (screen.height-window_height)/2;
    var window_left   = (screen.width-window_width)/2;
    //alert(theURL);
    newWindow=window.open(''+ theURL + '',
                          ''+ winName + '',
                          'width=' + window_width + ',height=' + window_height + ',top=' + window_top + ',left=' + window_left + ',features=' + newfeatures + '');
    newWindow.focus();
  }