<div id="overlay"></div>
<div id="overlayContent">
<img id="imgBig" src="" alt="" width="400" />
</div>
<img id="imgSmall" width="200" src="http://www.freeimageslive.com/galleries/space/earth/pics/a17_h_148_22718.gif" alt="" />
$("#imgSmall").click(function(){ $("#imgBig").attr("src","http://www.freeimageslive.com/galleries/space/earth/pics/a17_h_148_22718.gif");
$("#overlay").show();
$("#overlayContent").show();
});
$("#imgBig").click(function(){
$("#imgBig").attr("src", "");
$("#overlay").hide();
$("#overlayContent").hide();
});
#overlay{
position: fixed;
width: 100%;
height: 100%;
top: 0px;
left: 0px;
background-color: #000;
opacity: 0.7;
filter: alpha(opacity = 70) !important;
display: none;
z-index: 100;
}
#overlayContent{
position: fixed;
width: 100%;
top: 100px;
text-align: center;
display: none;
overflow: hidden;
z-index: 100;
}
#contentGallery{
margin: 0px auto;
}
#imgBig, #imgSmall{
cursor: pointer;
}