function PrepareExternalLinks()
{
    tags=document.getElementsByTagName("a");
    for (i in tags)
    {
        link = tags[i];
        if (link.rel && link.rel.indexOf('external')!=-1)
        {
          link.onclick = onExternalLinkActivate;
          link.onkeypress = onExternalLinkActivate;
        }
    }
}

function onExternalLinkActivate() {window.open(this.href); return false;}