$(window).load(function () {
$('#posts').masonry(),
$('.masonryWrap').infinitescroll({
navSelector : "div#navigation",  
nextSelector : "div#navigation a#nextPage", 
itemSelector : ".caixa",
bufferPx : 10000,
extraScrollPx: 11000,
loadingImg : "http://static.tumblr.com/8yo5xxv/3Dem80mch/loading.gif",
loadingText : "wait...",
},
// call masonry as a callback.
function() { $('#posts').masonry({ appendedContent: $(this) }); }
);
});