Adobe Air with HTML DOM

Question

How do I use Adobe Air with HTML DOM?

"<input type="text" class="inputtext" name="myemail" id="email" tabindex="1">"

I tried

1. document.getElementById('email').value = "[email protected]";
2. document.getElementById('myemail').value = "[email protected]";

It doesn't work

ReferenceError: Error #1069: Property getElementById not found on Main and there is no default value.