/* http://www.kryogenix.org/code/browser/searchhi/ */
/* Modified 20021006 to fix query string parsing and add case insensitivity */
/* Modified 20070316 to stop highlighting inside nosearchhi nodes */
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
	{ 
	    //word = '\\bwork[a-za-z]*\\b'
	    tempNodeVal = node.nodeValue.toLowerCase();
		tempWordVal = word.toLowerCase();
		
		
		if (tempNodeVal.search(tempWordVal) != -1) 
		{
			pn = node.parentNode;
			// check if we're inside a "nosearchhi" zone
			checkn = pn;
			while (checkn.nodeType != 9 && checkn.nodeName.toLowerCase() != 'body') 
			{ 
			    // 9 = top of doc
				if (checkn.className.match(/\bnosearchhi\b/)) 
				{ 
				    return; 
				}
				checkn = checkn.parentNode;
			}
			
			
			
			if (pn.className != "searchword") 
			{
			
			    var re = new RegExp(tempWordVal);
			    var matches = re.exec(tempNodeVal)
			
	
			    
    
			    
		        // word has not already been highlighted!
			    nv = node.nodeValue;
			    ni = tempNodeVal.search(tempWordVal);
				
			    // Create a load of replacement nodes
			    before = document.createTextNode(nv.substr(0,matches.index));
			    docWordVal = nv.substr(matches.index,matches[0].length);
			    after = document.createTextNode(nv.substr(matches.index+matches[0].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 (kw == null)
        return;
        
    if (kw.length > 0)
        for (var i = 0; i< kw.length; i++)
        {
        //word = '\\bwork[a-za-z]*\\b'
        if (kw[i].indexOf('*') < 0)
        {
            kw[i] = '\\b' + kw[i] + '\\b';
        }
        else
        {
            kw[i] = '\\b' + kw[i].replace('*','') + '[A-Za-z]*\\b';
        }
        highlightWord(document.getElementsByTagName("body")[0], kw[i]);
        }
    return;


	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;