5 Highlights arbitrary terms.
7 <http://johannburkard.de/blog/programming/javascript/highlight-javascript-text-higlighting-jquery-plugin.html>
12 <http://johannburkard.de>
17 jQuery.fn.highlight = function(pat) {
18 function innerHighlight(node, pat) {
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);
24 var spannode = document.createElement('span');
25 spannode.className = 'term';
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);
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);
41 return this.length && pat && pat.length ? this.each(function() {
42 innerHighlight(this, pat.toUpperCase());
46 jQuery.fn.removeHighlight = function() {
47 return this.find("span.term").each(function() {
48 $(this).contents().unwrap();