// JavaScript Document

function getLeaf(url) {
 var splited=url.split('?');// remove all the parameter from url
 url=splited[0];
 return url.substring(url.lastIndexOf("/")+1);// return file name without domain and path
 
} 

jQuery.fn.extend({
 enter: function() {//plugins creation
     return this.each(function() {
       var pth = $(this).find("img")[0];
	//alert($(this).children().attr("href"));
	//alert(document.location.href);
	    if($(this).children().attr("href")==getLeaf(document.location.href))
		{// check that the link url and document url is same
		   $(pth).attr("src",pth.src.replace(/.jpg/g, '_active.jpg'));
		 } else{
			    $(this).hover(function(){
				//$(pth).attr("src",pth.src.replace(/.jpg/g, '_over.jpg'));
		
				   }
				 ,function(){
                      $(pth).attr("src",pth.src.replace(/_over.jpg/g, '.jpg'));// mouse out image
				      });
               }
			     });
     }
});
$(function(){  // Document is ready
$(".menu li").enter();// call the function
});