http://www.javascript-coder.com/html-form/how-to-make-a-form-quickly.phtml
Reset button does not clear default values (does nondefault v.), unlike other button, which clears all values.

If none of the values of elements in form are set on page load, then Two buttons function same.
Set default for radio element named "business_category" to value: checked and click both buttons - Reset button cheks again.