$(document).ready(function(){
    var has_popup = false;
    
    var show_popup = function(path, parent) {
        if (!has_popup) {
            $.get(path, function(data, status){
                if (status == 'success') {
                    has_popup = true;
                    $(parent).after(data);
                    $('textarea').focus();
                }
            });
        };
    };
    
    $('a#comment').click(function(e){
        e.preventDefault();
        show_popup('/posts/' + $(this).attr('class') + '/comment', 'h3#comments');
    });
});