I would like to ask you about the way to reuse the code below for multiple images: 
<http://jsfiddle.net/a8c9P/> 

How to avoid redundancy in the CSS code?

An updated example: <http://jsfiddle.net/a8c9P/156>

```
$("#imgSmall").click(function() {     
    $("#imgBig").attr("src", "http://www.freeimageslive.com/galleries/sports/music/pics/musical_notes.jpg");
    $("#overlay").show();
    $("#overlayContent").show();
});

$("#imgBig").click(function(){
    $("#imgBig").attr("src", "");
    $("#overlay").hide();
    $("#overlayContent").hide();
});

```