[ISDP] 20170420 Form validation

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[Exercise] Essay (Open question) - asked in 2016-2 CSIEB0270 - Internet System Design and Practice by (18k points)
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<!DOCTYPE html>

<html>
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function validateForm() {
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** *** ********* ** (x == ****** * {
** * ***** ** ****** * * * ** ** *** ** *** *** * ** **** * must be filled out");
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}
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