[Acreator57887]

var $img = $('.demophoto');

$img.load(function (){
var CurImg = $(this);

CurImg.removeAttr("width");
CurImg.removeAttr("height");

var width = CurImg.width();
var height = CurImg.height();

if (width > height) {
CurImg.css('height', 180);
} else {
CurImg.css('width', 180);
};

var width_e = CurImg.width();
var height_e = CurImg.height();

if (width_e > 180) {
var rig = (width_e-180)/2;
CurImg.css('right', rig);
} else {
var bot = (height_e-180)/2;
CurImg.css('bottom', bot);
};

CurImg.css('display', block);
});

http://test-0-1.ucoz.ru/photo