Hi, I've tried to use the following code (and many other slight variations) in order to create a mandatory checkbox i.e. it needs to be checked in order for the form to submit. However it just will not work! Can anyone advise? I've checked other posts and the following seems the most simple and neat and I can't see why it won't work.
<script type="text/javascript" language="javascript">
function EmptyCheck(sender, args)
{
if(document.getElementById('<%= NewAltAddress.Client ...
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