file open dialog box in client side script

Hi all,
How can I display the file open dialog box at client side using javascript or vbscript.
I have used

Code:

---

dim obj
set obj = CreateObject("MSComDlg.CommonDialog.1")
obj.ShowOpen()

---

but this is not working
I want to get only file paths from the user. I don't want to upload a file, so i am not using Html file input control.

thanks and regards,