$(document).ready(function(){
    $('body.selfevaluation .site').each(function () {
        var description = $('.description', this);
        var h3 = $('h3', this);
        var span = $('span', h3);
        description.css({
            'left': span.position().left,
            'top': span.position().top + span.height()
        });
        h3.mouseover(function () {
            description.show();
        }).mouseout(function () {
            description.hide();
        });
    });
});