输入后隐藏输入文本，输入后隐藏密码

Well the situation is like this: i have form to login on my page with 2 textboxes, so one is for username and other for password, I am using razor and asp.net mvc 3 so my pasword textbox is already displaying little circles instead of password chars. Can i somehow make it to work like this: I am entering my passwork but i see what char it is but after 2 or 3 seconds my char become a circle/dot which is default for entering paswords.Well the situation is like this: i have form to