Open links to sites (who set X-Frame-Options: SAMEORIGIN) in a new window if the current site is loaded in a frame.

linkedinAndXingInNewWindow.js

function inFrame() {
    try {
        return window.self !== window.top;
    } catch (e) {
        return true;
    }
}

window.onload = function(){
    if(inFrame()){
        var anchors = document.getElementsByTagName('a');
        for (var i=0; i<anchors.length; i++){
            if (anchors[i].href.match(/xing|linkedin/)) {
                anchors[i].setAttribute('target', '_blank');
            }
        }
    }
}