I know that for security reasons, it's generally frowned upon to try and maintain a password field on a postback, but I'd still like to figure out a way to have it done. For example, Twitter. If you try to start a new account, and let's say the username you've chosen has already been taken, the page posts back with an error. But, with Twitter, the password field does not clear. How are they doing this?
I find it annoying in a situation like this, because if the username is already taken, that means you have to go back and fill in the password field too.
How does Twitter do this?...
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