// JavaScript Document
/* 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,links,info,text) {
	// 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,links,info,text);
		}
	}
	
	// And do this node itself
	if (node.nodeType == 3) { // text node
		tempNodeVal = node.nodeValue.toLowerCase();
		tempWordVal = word.toLowerCase();
		pos = tempNodeVal.indexOf(tempWordVal);
		if (pos != -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;
			}
			nv = node.nodeValue;
			ni = tempNodeVal.indexOf(tempWordVal);
			if (pn.className != "searchword" && pn.nodeName!='A' && pn.nodeName!='SCRIPT' && pn.nodeName!='NOSCRIPT' && pn.parentNode.nodeName!='A') {
				// word has not already been highlighted!
				
				// 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("a");
				hiword.className = "searchword";
				
				hilink = document.createAttribute("href");
				hilink.nodeValue = links;
				hiword.setAttributeNode(hilink);
				
				hititle = document.createAttribute("title");
				hititle.nodeValue = info.concat('\n',text);
				hiword.setAttributeNode(hititle);
				
				hiword.appendChild(hiwordtext);
				
				pn.insertBefore(before,node);
				pn.insertBefore(hiword,node);
				pn.insertBefore(after,node);
				pn.removeChild(node);
			}
		}
	}
}

function highlight(words,links,info,text) {
	if(words.length!=0) {
		for(i=0;i<words.length;i++) {
			highlightWord(document.getElementsByTagName("body")[0],words[i],links[i],info[i],text);
		}
	}
}