function bookmark(address,sitename) {
  if (window.sidebar) 
  {
    window.sidebar.addPanel(sitename, address,"");
  } else if( document.all ) 
  
  {
    window.external.AddFavorite(address,sitename);
  } else if(window.opera&&window.print) 
  
  {
    return true;
  }
}

function displayWindow(theURL,winName,width,height,features) { 
    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;
    newWindow=window.open(''+ theURL + '',''+ winName + '','width=' + window_width + ',height=' + window_height + ',top=' + window_top + ',left=' + window_left + ',features=' + newfeatures + '');
    newWindow.focus();
}