function highlightWord(node,word) {
        // Iterate into this nodes childNodes
        if (node.hasChildNodes) {
                var hi_cn;
                for (hi_cn=0;hi_cn<node.childNodes.length;hi_cn++) {
                        highlightWord(node.childNodes[hi_cn],word);
                }
        }

        // And do this node itself
        if (node.nodeType == 3) { // text node
                tempNodeVal = node.nodeValue.toLowerCase();
                tempWordVal = word.toLowerCase();
                if (tempNodeVal.indexOf(tempWordVal) != -1) {
                        pn = node.parentNode;
                        if (pn.className != "searchword") {
                                // word has not already been highlighted!
                                nv = node.nodeValue;
                                ni = tempNodeVal.indexOf(tempWordVal);
                                // Create a load of replacement nodes
                                before = document.createTextNode(nv.substr(0,ni));
                                docWordVal = nv.substr(ni,word.length);
                                after = document.createTextNode(nv.substr(ni+word.length));
                                hiwordtext = document.createTextNode(docWordVal);
                                hiword = document.createElement("em"); // modified from span to em
                                hiword.className = "searchword";
                                hiword.appendChild(hiwordtext);
                                pn.insertBefore(before,node);
                                pn.insertBefore(hiword,node);
                                pn.insertBefore(after,node);
                                pn.removeChild(node);
                        }
                }
        }
}


function googleSearchHighlight() {
        if (!document.createElement) return;

        if (document.referrer.search(/google.+/) != -1) {
                ref = decodeURI(document.referrer);
        } else { // für seiteninterne Suche
                ref = unescape(document.referrer);
        }

        // added for site search - where target-file is called with ?q=searchword
        if (window.location.search) ref = unescape(window.location.search);

        if (ref.indexOf('?') == -1) return;

        qs = ref.substr(ref.indexOf('?')+1);
        qsa = qs.split('&');

        for (i=0;i<qsa.length;i++) {
                qsip = qsa[i].split('=');
                if (qsip.length == 1) continue;
                if (qsip[0] == 'q' || qsip[0] == 'p' || qsip[0] == 's') { // q= for Google, p= for Yahoo, s= for wordpress

                        // words not to be highlighted:
                        qsip[1] = qsip[1].replace(/\"|\'|\*|\bfür\s*\b|\bde.\s*\b|\bdie\s*\b|\bdas\s*\b|\bauf\s*\b|\beine+.\s*\b|\bein\s*\b|\bund\s*\b|\b..\s*\b|\bwie\s*\b|\bkann\s*\b|\bich\s*\b|\bman\s*\b|\bmit\s*\b/gi,'');

                        // remove all blanks and '+' before and after searchterm (bugfix: crashes FF & Op)
                        qsip[1] = qsip[1].replace(/^(\s+|\++)/,'').replace(/(\++)$/,'').replace(/(\s+)$/,'');


                        if (qsip[1] != '') {
                        words = unescape(qsip[1].replace(/\+/g,' ')).split(/\s+/);
                                for (w=0;w<words.length;w++) {
                                        highlightWord(document.getElementsByTagName("body")[0],words[w]);
                                }
                        }
                }
        }
}

window.onload = googleSearchHighlight;