/*

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, enlace, elemento) {
	
	function innerHighlight(node, pat) {
		
		var skip = 0;
		if (node.nodeType == 3) {
			
			var pos = node.data.toUpperCase().indexOf(pat);
			if (pos >= 0) {
				
				var spannode = document.createElement('a');
				spannode.href = enlace;
				spannode.target = "_blank";				
				spannode.className = 'highlight magicword '+elemento;				
				var middlebit = node.splitText(pos);
				var endbit = middlebit.splitText(pat.length);
				var middleclone = middlebit.cloneNode(true);
				spannode.appendChild(middleclone);
				middlebit.parentNode.replaceChild(spannode, middlebit);
				skip = 1;
				
			}
			
		}
		else if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
	
			for (var i = 0; i < node.childNodes.length; ++i) {
				i += innerHighlight(node.childNodes[i], pat);
			}
		}
		
		return skip;
		
	}
	
	return this.each(function() {
		innerHighlight(this, pat.toUpperCase());
	});
};


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