Contact Form clears when Back button is pressed

[mrtechnique]

I'm working on installing a CAPTCHA form on http://www.solarbiomedical.com/contact-us.php and when the CAPTCHA phrase is entered incorrectly and the user goes back to the page via a Javascript history function, the form is completely cleared out. As a matter of fact, the form just clears every time I go back to it by hitting the back button.

This is not the case with any of my other sites I have installed the CAPTCHA form on (www.sequoiagreenscapes.com and my site at www.mrtechnique.com). You can try entering a wrong CAPTCHA phrase and see the form still filled out after you go back to the page.

Thank you in advance for helping me with this.