/*

highlight v3

Highlights arbitrary terms.

<http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html>

MIT license.

Johann Burkard
<http://johannburkard.de>
<mailto:jb@eaio.com>

*/

jQuery.fn.highlight = function(pat, id) {
	function innerHighlight(node, pat, id) {
		var skip = 0;
//		console.log('node.nodeType: '+node.nodeType);
//		console.log('node.tagName: '+node.tagName);
//		console.log('node.nodeName: '+node.nodeName);
//		console.log('node.nodeValue: '+node.nodeValue);
//		console.log('node.getAttribute("id"): '+node.getAttribute("id"));
		if (node.nodeType == 3) {
			var pos = node.data.toUpperCase().indexOf(pat);
			if (pos >= 0) {
				var spannode = document.createElement('span');
				spannode.className = 'textAdHighlight';
                                if(id){
                                spannode.setAttribute('id', id);
                                }
				var middlebit = node.splitText(pos);
				var endbit = middlebit.splitText(pat.length);
				var middleclone = middlebit.cloneNode(true);
				spannode.appendChild(middleclone);
				middlebit.parentNode.replaceChild(spannode, middlebit);
				return;
				//skip = 1;
			}
		}
		else if (node.nodeType == 1 && node.childNodes && !/(h1|h2|h3|h4|h5|script|style|ul|li|a)/i.test(node.tagName)) {
			for (var i = 0; i < node.childNodes.length; ++i) {
				i += innerHighlight(node.childNodes[i], pat,id);
			}
		}
		return skip;
	}
	return this.each(function (){innerHighlight(this, pat.toUpperCase(),id);});
};

jQuery.fn.removeHighlight = function() {
 return this.find("span.highlight").each(function() {
  this.parentNode.firstChild.nodeName;
  with (this.parentNode) {
   replaceChild(this.firstChild, this);
   normalize();
  }
 }).end();
};