Selenium: Verify submit button is disabled after first click

To make sure a forms submit button is disabled after it is clicked once, a Selenium test should look like this:

click
_button

verifyNotEditable
_button
true

waitForPageToLoad
50000

The button will be clicked (without waiting). Then it verifies that the button is disabled. Finally we wait for the next page to load.

Selenium Testing with Prototype AJAX

If you are using Selenium to test your web application and you are having some AJAX in it, you may know that the waitForCondition assertion is your friend.
According to the Selenium documentation it:
Runs the specified JavaScript snippet repeatedly until it evaluates to “true”.
With this you can define your own condition which defines the end of [...]