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Hello there Javascripters,
I saw some websites which use javascript to validate a login form. And when your username contains characters while they arent allowed you see a little popup in the same window with the requirements and with what you already did and what you have to do. So how can i make that popup?
You can also see an example at the website of league of legends, i think its leagueoflegends.com.
Thanks in advance,
Aigyptus