Inputs and outputs

If you want to ask the user to insert a value, you have to use <prompt> element. The optional message is specified by the id:

<h2 id="foo">
    <prompt id="Please insert a value for foo: ">
    </prompt>
</h2>

this code is compiled as:

foo = prompt('Please insert a value for foo: ');

Outputs are displayed with <cite> element:

<cite>
    <b id="+">
        <p>Foo now has value: </p>
        <p id="foo"></p>
    </b>
</cite>

Which is compiled as an alert() function:

alert(('Foo has new value: ' + foo))