Using AJAX Textbox Extenders

1. Watermark Extender
2. Filtered TextBox
3. Masked Edit TextBox and Masked Edit Validator
4. Calendar Extender
5. Validator Callout Extender
6. Auto Complete Extender
7. Password Strength Extender

Reference:

http://www.c-sharpcorner.com/uploadfile/dpatra/using-ajax-textbox-extenders/