// Adds the current page to bookmarks
function ChElBookmark() 
{
  var bmarkURL = window.document.URL;
  var bmarkTitle = window.document.title;

// IE Windows
  if (window.external)
  {
    window.external.AddFavorite(bmarkURL, bmarkTitle);
  }

// Opera
  else if (navigator.userAgent.indexOf('Opera') != -1)
  {
    alert("Press CTRL + T to bookmark this page");
  }

// IE Mac
  else if (document.all && (navigator.userAgent.indexOf('Win') < 0))
  {
    alert("Press COMMAND + B to bookmark this page");
  }

// Netscape / Mozilla
  else
  {
    alert("Press CTRL + D to bookmark this page");
  }
}