/Javascript/jQuery/Jquery validate checkbox before submit

Jquery validate checkbox before submit

$(document).ready(function() {
    $('#form1').submit(function() {
        if ($('input:checkbox', this).length == $('input:checked', this).length ) {
            // everything's fine...
        } else {
            alert('Please tick all checkboxes!');
            return false;
        }
    });
});

Source: stackoverflow.com

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