1/*
  2
  3highlight v5
  4
  5Highlights arbitrary terms.
  6
  7<http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html>
  8
  9MIT license.
 10
 11Johann Burkard
 12<http://johannburkard.de>
 13<mailto:jb@eaio.com>
 14
 15*/
 16
 17jQuery.fn.highlight = function(pat) {
 18 function innerHighlight(node, pat) {
 19  var skip = 0;
 20  if (node.nodeType == 3) {
 21   var pos = node.data.toUpperCase().indexOf(pat);
 22   pos -= (node.data.substr(0, pos).toUpperCase().length - node.data.substr(0, pos).length);
 23   if (pos >= 0) {
 24    var spannode = document.createElement('span');
 25    spannode.className = 'highlight';
 26    var middlebit = node.splitText(pos);
 27    var endbit = middlebit.splitText(pat.length);
 28    var middleclone = middlebit.cloneNode(true);
 29    spannode.appendChild(middleclone);
 30    middlebit.parentNode.replaceChild(spannode, middlebit);
 31    skip = 1;
 32   }
 33  }
 34  else if (node.nodeType == 1 && node.childNodes && !/(script|style)/i.test(node.tagName)) {
 35   for (var i = 0; i < node.childNodes.length; ++i) {
 36    i += innerHighlight(node.childNodes[i], pat);
 37   }
 38  }
 39  return skip;
 40 }
 41 return this.length && pat && pat.length ? this.each(function() {
 42  innerHighlight(this, pat.toUpperCase());
 43 }) : this;
 44};
 45
 46jQuery.fn.removeHighlight = function() {
 47 return this.find("span.highlight").each(function() {
 48  this.parentNode.firstChild.nodeName;
 49  with (this.parentNode) {
 50   replaceChild(this.firstChild, this);
 51   normalize();
 52  }
 53 }).end();
 54};
 55