Keyboard obscures form submit button. What to do?

Keyboard obscures form submit button. What to do?

The last field of my JQueryMobile app form is a text field.

On Android Chrome the keyboard comes up and I can enter text, but there is no easy way to dismiss the keyboard in order to see the submit button. The best I can do is go back up the form and touch away from an input field and then scroll down again to find the button.

On IOS there is a [done] button that dismisses the keyboard.

Is there a programmatic way to make the keyboard disappear?