jQuery.fn.highlight = function(pat) {
 return this.each(function() {
	  var data = ' ' + this.innerHTML + ' ';
	  var pattren = new RegExp('([^a-zà-ÿ¸¨0-9])(' + pat.replace(new RegExp('å', 'gi'), '[å¸]') + '[a-zà-ÿ¸¨]{0,2})([^a-zà-ÿ¸¨0-9])', 'gi');
	  this.innerHTML = this.innerHTML.replace(pattren, '$1<span class="highlight">$2</span>$3');

 });
};