radio button's use of document.getElementbyName results in false positives

[awirick]

If you have more than 1 form on a page, it is possible to collide with another form that uses the same names for inputs. e.g.

<form>
<input type="text" name="input1" required>
</form>

<form>
<input type="radio" name="input1" value="single">
<input type="radio" name="input1" value="double">
</form>

The following would result in a non submitted second form on submit, due to the first form's input's required attribute.