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function bookmark() {
var url = this.location;
var caption = document.title;
document.write("<a href=\"javascript:addfav('" + url + "', '" + caption + "');\"><img src=\"/images/bookmark.jpg\" class=\"bookmark-icon\" alt=\"Bookmark this page\"/></a>")
}

function addfav(url, sitename)
{
  ns="Firefox and Netscape users, please press CTRL+D to bookmark this site."
  if ((navigator.appName=='Microsoft Internet Explorer') &&
    (parseInt(navigator.appVersion)>=4))
  {
    window.external.AddFavorite(url, sitename);
  }
  else if (navigator.appName=='Netscape')
  {
    alert(ns);
  }
}