/*
 * 
 * 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) {
	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('span');
				spannode.className = 'highlight';
				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();
};