if(!XHTMLCompatibility)
{
    var XHTMLCompatibility = {};
}

XHTMLCompatibility.InsertExternalLinks = function()
{
    var arrAnchors=document.getElementsByTagName("a");
    
    for(var nIndex=0; nIndex<arrAnchors.length; nIndex++)
    {
        if(arrAnchors[nIndex].getAttribute("href") && arrAnchors[nIndex].getAttribute("rel") == "external")
        {
            arrAnchors[nIndex].target = "_blank";
        }
    }
}