You can bypass the "post" button limit if you continually hold the button as you press post. So you can hold the "e" button to continually enter "e" past 140 characters and so long as you don't stop pushing the e key; you can hit the post button.
It only "counts" after you finish the type. So as soon as you stop pushing the e key; it'll follow the counter and then disable.
Replace this line with your code.