U.Helper

$('a.threadAuthorLink').hover(function (e) {
e = e || window.event;
$('body').append($('<div class="ava" style="background: #eee; border: 1px dashed black; position: absolute; width: 100px; height: 100px;"></div>').css({
top: e.pageY,
left: e.pageX
}).load(this.href + ' img.userAvatar:first', function () {
$('div.ava img').css({
width: '100px',
height: '100px'
});
}));
},
function () {
$('div.ava').remove();
});