Jquery Gallery. Calculate the position and size of the photo

Jquery Gallery. Calculate the position and size of the photo

Hello. I'm trying to finish this code, so that the image can be a different size in the gallery. Now they have the same size of 150px, which is set in the img.

<img width="150" height="150" src="#"/>
I think so
var w = $(this).width();
var h = $(this).height();
var pos = $(this).position();
and while animating:
$(this).animate({ height: h + '+150px', width: w + '+150px', left: pos + '-=35', top: pos + '-=35' }
but it's not working. what am I doing wrong? Demo - http://jsfiddle.net/HAQt3/1/ .In the end, I want to get something like this http://i.pixs.ru/storage/7/9/3/220pxDiver_8448503_5895793.png where the images are all different sizes and beautifully arranged, and if they increase guidance. Thanks