var ref = "";
function highlightWord(node,word) {
	if (node.hasChildNodes) {
		var hi_cn;
		for (hi_cn=0;hi_cn<node.childNodes.length;hi_cn++) {
			highlightWord(node.childNodes[hi_cn],word);
		}
	}	
	if (node.nodeType == 3) { 
		tempNodeVal = node.nodeValue.toLowerCase();
		tempWordVal = word.toLowerCase();
		if (tempNodeVal.indexOf(tempWordVal) != -1) {
			pn = node.parentNode;
			klasse = "searchword"+w;
			if (pn.className != klasse) {
				nv = node.nodeValue;
				ni = tempNodeVal.indexOf(tempWordVal);
				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("e");
				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(/search.+/) != -1 && document.URL.indexOf("search") == -1 ) {
		ref = unescape(document.referrer);	
		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 || qsip.length == 5) continue;
        	if (qsip[0] == 'query') {
	        if (qsip[1].length < 2 ) continue;

			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)
					words[w] = words[w].replace(/\.|,|;|!|\?|:|"|'|-|\//gi,'');
					highlightWord(document.getElementsByTagName("body")[0],words[w]);
                		}
			}
	        }
	}
}

window.onload = Highlight;