jQuery.fn.highlight = function(words, settings) {
	var highlight_settings = {split: ' ', className: 'h_light', caseSensitive: false};
	highlight_settings = jQuery.extend(highlight_settings, settings);
 
	function wordsHighlight(node, words) {
		if (node.nodeType == 3) {
		    var regexp = new RegExp("(" + words.replace(new RegExp(highlight_settings.split, 'g'), "|") +")", (highlight_settings.caseSensitive ? "" : "i") + "g");
		    var str = jQuery('<div></div>').text(node.data).html();
		    jQuery(node).replaceWith(str.replace(regexp, '<span class="' + highlight_settings.className + '">$1</span>'));
		} else if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
			jQuery(node).contents().each(function() {
				wordsHighlight(this, words);
			});
		}
	}
 
	return this.each(function() {
	    wordsHighlight(this, words);
	});
};
 
jQuery.highlightHtml = function (html, words, settings) {
	return jQuery('<div>' + html + '</div>').highlight(words, settings).html();
}

/*

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 = 'h_light';
    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();
};
*/