/*

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, highlightclass) {
    if (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';
                    spannode.className = highlightclass;
                    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(highlightclass) {
    return this.find("span." + highlightclass).each(function() {
        this.parentNode.firstChild.nodeName;
        with (this.parentNode) {
            replaceChild(this.firstChild, this);
            normalize();
        }
    }).end();
};