Javascript Input Form with Output Random Word Question

How can I create a form with an input where you can enter some text and a submit button.

When the user inputs some text and submits, below the form you should get the text with the letters of the text arranged in random order.

For instance if the input is Hello, the output could be olelH. I could manage to code a form with textbox, and I also know how to random it but I couldn't merge them together.