/* http://www.kryogenix.org/code/browser/searchhi/ */ 
/* Modified 20021006 to fix query string parsing and add case insensitivity */ 

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"); 
				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; 
	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') 
			{ // q= for Google, p= for Yahoo 
				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;