<button> elements with no "type" don't send their value on submit

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Description:

elements with no type attribute default to type "submit" (see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/button#attr-type). When clicked, the form should be submitted and the request should contain the value of the button. ### Expected Behavior: With this form: ```html

Button without type Button with type ``` Clicking either button should send the values "button1=ok" or "button2=ok". ### Actual behavior: Without ajaxform, the form works as expected in Firefox and Chromium. With ajaxform, clicking button2 works as expected, but clicking button1 doesn't send "button1=ok". ### Remarks This is caused, as far as I understand, by the `captureSubmittingElement` function looking explicitly for elements with "type=submit".