$('#gallery a#next_g').click(function(next){
next.preventDefault();
var imgPath=$('#gallery a#foto').attr('href');
var Oldimage=$('#gallery a#foto');
var next=$('#images a[href="'+imgPath+'"]').next('#images a').attr('href');
  
if (next==null) {next=imgPath;}
var Newimage=$('<a id="foto" href='+next+'><img border=0px src='+next+'></a>');
Newimage.hide();
$('#gallery').prepend(Newimage);
Newimage.fadeIn(1);
Oldimage.remove();
});

var images  = new Array();
$(function(){
$("#images a").each(function(index){
images[index] = this;
this.setAttribute("data-index", index);
});

('#gallery a#next_g').click(function(next){
var newImage = $(images[this.getAttribute("data-index")+1]).clone();
newImage.attr("id", "foto").prependTo($("#gallery"));
});

});