/* http://www.kryogenix.org/code/browser/searchhi/ */
/* Modified 20021006 to fix query string parsing and add case insensitivity */
/* Modified  by webdesign.weisshart.de:
   20050530: added for site search - where target-file is called with ?q=searchword 
             unescape -> decodeURI, to cope with german Umlauts
   20050611: remove all blanks and '+' before and after searchterm (bugfix: crashes FF & Op) */

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("span"); // 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;
	//ref = document.referrer; // referer
	ref = window.location; // aktuelle URL

	// 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] == 's') { // s ist der s=string in der URL

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

			//words = decodeURI(qsip[1].replace(/\+/g,' ')).split(/\s+/); //unescape -> decodeURI, to cope with german Umlauts
	         //word[0] = "iwb";
	         
					for (w = 0; w < words.length; w++) 
					{
						highlightWord(document.getElementsByTagName("body")[0],words[w]);
                	}
	        }
	}
}

function onLoad()
{
	highlightWord(document.getElementsByTagName('body')[0],"iwb");
}