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Since this post didn't result in much help in general discussion, I therefore take the liberty to post it here under member support. I have made a small vote system. Each user can only cast only cast one vote. I've set the userid as the key. Therefore, if a user tries to cast a vote twice it...

I am making a small voting system on my web page. The table will contain a hidden username (defined as key to avoid multiple votes) and a checkbox with 10 around candidates. How can I make a validation to make sure the users vote for 5 candidates (that they check exactly five boxes for the...