/*

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 == null) {
	return skip;
  }
  else {	
  if (node.nodeType == 3) {
	reEOL = /\n/g;
	var nodedata = node.data;
	nodedata = nodedata.replace(reEOL,' '); 
	var m = pat.exec(nodedata);
	if (m==null) {
		skip = 0;
	} else {
	pos = m.index;
	len = m[0].length;
    	var spannode = document.createElement('span');
    	spannode.className = 'highlight';
    	var middlebit = node.splitText(pos);
    	var endbit = middlebit.splitText(len);
    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() {
	pat = pat.replace(/ /g,"[\\s\\WhavingofandtheisunderABCDEFG]+");
	var re = new RegExp(pat,'i');
  	i = innerHighlight(this, re);
	node = this;
	n= 0;
	while (i==0  &&  node && n<6  ) {
		if ( node.nextSibling==null) {
			node=node.parentNode;
		}
		else {
			node = node.nextSibling;
		}
  		i += innerHighlight(node, re);
		n++;
	}
		
   });
};

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