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§ Validating email addresses (it's impossible) (Rant Alert!)

Search google for "validate email address" and you'll get about 303,000 results.  I bet all of them are wrong...

Short version:

Why bother?  I'm probably going to enter "example@example.com" anyway.

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§ Simpler validate form fields are filled in (no additional class names)

Makes sure something is entered in form fields.  If your form fields have classnames, don't use this one!

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§ Validate form fields are filled in (additional class names)

Makes sure something is entered in form fields.  Uses regex to replace classnames so other classnames aren't affected.

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The abbot shook his head.  “Michael and the others went too far when they went to the Kaiser.  It is not for us to order the affairs of kings, but to care for the poor and lowly.”
“That,” said Dietrich, “may require you to order the affairs of kings.”
an abbot & Dietrich, Eifelheim, Michael Flynn