/* http://www.kryogenix.org/code/browser/searchhi/ */
/* Modified  by webdesign.weisshart.de/  28.03.06*/

var ref = "";

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;
			klasse = "searchword"+w; // different colors for differnt searchterms

			if (pn.className != klasse) {
				// 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 = klasse;
				hiword.appendChild(hiwordtext);
				pn.insertBefore(before,node);
				pn.insertBefore(hiword,node);
				pn.insertBefore(after,node);
				pn.removeChild(node);
			}
		}
	}
}

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


	if (document.referrer.search(/google.+/) != -1 || document.referrer.search(/lycos.+/) != -1 || document.referrer.search(/yahoo.+/) != -1 || document.referrer.search(/fireball.+/) != -1 ||document.referrer.search(/search\.msn.+/) != -1 ) {
		ref = decodeURIComponent(document.referrer);
		if (ref.indexOf('?') == -1) return;
	}

	// added for site search
	// the following if { } is required for framesets only
        if (document.referrer.search(/suchen.+/) != -1 && document.URL.indexOf("suchen") == -1 ) {
           ref = unescape(document.referrer);
	   if (window.location.search) ref = unescape(window.location.search);
	}

	if (window.location.search) { ref = unescape(window.location.search); }


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

        qs = qs.replace(/\.|,|;|!|\?|:|"|'|\//gi,'');
	qsa = qs.split('&');

	for (i=0;i<qsa.length;i++) {
		qsip = qsa[i].split('=');
	        if (qsip.length == 1 || qsip.length == 5) continue;
        	if (qsip[0] == 'q' || qsip[0] == 'query' ||qsip[0] == 'p' || qsip[0] == 's' ) { // q= for Google, p= for Yahoo, query= Fireball, Lycos etc., s= for wordpress
	        if (qsip[1].length < 3 ) continue;


			// words not to be highlighted:
			qsip[1] = qsip[1].replace(/\"|\'|\*|;|\bbei\b|\bfür\b|\bvon\b|\bnicht\b|\bde.\s*\b|\bdie\b|\bdas\b|\bauf\b|\bein\b|\bund\b|\bwie\b|\bkann\b|\bich\b|\bman\b|\bmit\b|\ist\b|Suchbegriff/gi,'');
				
			qsip[1] = qsip[1].replace(/Suchbegriff/gi,'');
                        if (document.URL.indexOf('blog') >= 1) qsip[1] = qsip[1].replace(/\d\d|\d/g,''); // 1/2-digit number in blogs
                        
			// 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++) {
					if (words[w].length >= 3) {
                                  // Endlosschleife: words[w] = words[w].replace(/\.|,|;|!|\?|:|"|'|-|\//gi,'');
					    highlightWord(document.getElementsByTagName("body")[0],words[w]);
					}
                		}
			}
	        }
	}
}

window.onload = Highlight;