大侠啊跪求JavaScript版本的ＦolderBrowseDialog(C#)兑现

大侠啊，跪求JavaScript版本的ＦolderBrowseDialog(C#)实现？
大侠帮忙啊，求求了！

我只要浏览文件夹，不要取里面的文件！
------解决方案--------------------
// The following example displays an application that provides the ability to 
// open rich text files (rtf) into the RichTextBox. The example demonstrates 
// using the FolderBrowserDialog to set the default directory for opening files.
// The OpenFileDialog class is used to open the file.
using System;
using System.Drawing;
using System.Windows.Forms;
using System.IO;

public class FolderBrowserDialogExampleForm : System.Windows.Forms.Form
{
    private FolderBrowserDialog folderBrowserDialog1;
    private OpenFileDialog openFileDialog1;
    
    private RichTextBox richTextBox1;

    private MainMenu mainMenu1;
    private MenuItem fileMenuItem, openMenuItem;
    private MenuItem folderMenuItem, closeMenuItem;
    
    private string openFileName, folderName;

    private bool fileOpened = false;

    // The main entry point for the application.
    static void Main() 
    {
        Application.Run(new FolderBrowserDialogExampleForm());
    }


    // Constructor.
    public FolderBrowserDialogExampleForm()
    {
        this.mainMenu1 = new System.Windows.Forms.MainMenu();
        this.fileMenuItem = new System.Windows.Forms.MenuItem();
        this.openMenuItem = new System.Windows.Forms.MenuItem();
        this.folderMenuItem = new System.Windows.Forms.MenuItem();
        this.closeMenuItem = new System.Windows.Forms.MenuItem();

        this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
        this.folderBrowserDialog1 = new System.Windows.Forms.FolderBrowserDialog();
        this.richTextBox1 = new System.Windows.Forms.RichTextBox();

        this.mainMenu1.MenuItems.Add(this.fileMenuItem);
        this.fileMenuItem.MenuItems.AddRange(
                            new System.Windows.Forms.MenuItem[] {this.openMenuItem,
                                                                 this.closeMenuItem,