function showDialog(title, msg, url, name, post, callback, def, validate) {
    $('body').append(
        '<div id="dialog">' +
            '<div class="hd">' + title + '</div>' +
            '<div class="bd">' +
                '<form method="POST" action="' + url + '?' + $.param({ format: 'json' }) + '">' +
                    '<label>' + msg + '</label>' +
                    '<input type="text" name="' + (name || 'text') + '" />' +
                '</form>' +
            '</div>' +
        '</div>'
    );

    if (def) {  // Default text
        $('#dialog input:text').val(def);
    }

    if (YAHOO.lang.isFunction(callback)) {
        callback = { success: callback };
    }

    var handleSubmit = function() {
        this.submit();
    };

    var handleCancel = function() {
        if (callback.cancel) {
            callback.cancel();
        }

        this.destroy();
    };

    var dialog = new YAHOO.widget.Dialog('dialog', {
        buttons: [
            { text: 'OK'    , handler: handleSubmit, isDefault: true },
            { text: 'Cancel', handler: handleCancel }
        ],
        fixedcenter: true   , modal : true, postdata: $.param(post || {}),
        width      : '300px', zIndex: 1000
    });

    dialog.callback = {
        success: function(o) {
            var data = $.parseJSON(o.responseText);

            if (data.success) {
                callback.success(data);
            } else {
                if (callback.failure) {
                    callback.failure(data);
                } else {
                    showSimpleDialog(data.error, true);
                }
            }

            dialog.destroy();
        }
    };

    dialog.validate = function() {            // Empty input not to be submitted, and Renaming
        var v = this.getData()[name].trim();  // Brief requires customized validate, @13175527

        if (!v.length) {
            alert('This is a required field!');
        }

        return v.length && (!validate || validate(v));
    };

    dialog.render(document.body);
}