Question

I can’t figure out why my checkbox is always evaluating to “yes” regardless of what is checked.

the html:

<input type="checkbox" name="email" id="email" value="yes">Yes<br>
<input type="checkbox" name="email" id="email" value="no" checked >No<br>

which is being accessed by

var email = document.getElementById('email').value;

and the php is just $_GET-ing the value of ’email’ but it always processes it as it being set to “yes”.

Answer 1

Because ID attribute should be unique, and document.getElementById returns first matched element.