jQuery.fn.highlight = function( settings ) {
        settings = jQuery.extend({
            pat: 'default',
            className: 'thickbox',
            tag: 'a',
            href: 'default'
        },settings);
 
 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( settings.tag );
    spannode.className = settings.className;
    if(settings.tag=="a"){
        spannode.href = settings.href;
    }
    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], settings.pat.toUpperCase());
   }
  }
  return skip;
 }
 return this.each(function() {
  innerHighlight(this, settings.pat.toUpperCase());
 });
};

jQuery.fn.removeHighlight = function(className) {
 return this.find("span."+className).each(function() {
  this.parentNode.firstChild.nodeName;
  with (this.parentNode) {
   replaceChild(this.firstChild, this);
   normalize();
  }
 }).end();
};