Input fields are retaining their values after a page refresh, how to prevent that?

Answer 1

Those values are just auto-filled by the client side (the webbrowser) based on the client history. You need to add autocomplete="off" to the form or the individual input fields for which you'd like to turn it off.

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or

    
    
    
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No need for nasty JS hacks which may not work on all environments.

See also:

• W3 Web Forms 2.0 specification - autocomplete attribute

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Unrelated to the concrete problem, your HTML structure is far from valid. I'd suggest to pass your page through http://validator.w3.org and fix the errors/warnings accordingly.