title: Input type image doesn't submit the form when you hit enter
body: <p>I have a form and the input you need to click to submit the form has type="image". I want to make it so when your focusing on another input of the form  and you hit enter the form is submitted (as if you clicked the input type image). </p>
  
  <p>Do I need to use javascript to create this behavior? </p>
  
  <p>Is this default behavior and considered good accessibility, usability and UX? Im pretty sure ive seen it on a number of sites. </p>