$(function() {
    $(".description").attr("expanded", false).hide();
    $(".avatar").click(function(e) {
        var parent = $(this).parents("li:first");
        var description = $(".description", parent);
        var expanded = description.attr("expanded") == true;

        $(".description").attr("expanded", false).hide();
        
        if (expanded)
            description.attr("expanded", false).hide();
        else
            description.attr("expanded", true).show();
    });
});