jQuery disable enable submit button

Question

I want to do something like this:

• When the text field is empty, the submit should be disabled (disabled="disabled").
• When something is typed in the text field to remove the disabled attribute.
• If the text field becomes empty again(the text is deleted) the submit button should be disabled again.

This is my HTML:

<input type="text" name="textField" />

<input type="submit" value="send" />

Does anyone have any ideas on this?