Remove Checkbox Attributes
by Esko Cruzeta
HTML
<input name="group" type="checkbox" checked="checked" value='1' disabled='disabled' />
<input name="group" type="checkbox" checked="checked" value='2' disabled='disabled' />
<input name="group" type="checkbox" checked="checked" value='3' />
JavaScript
document.getElementsByName('group')[0].removeAttribute('disabled');
document.getElementsByName('group')[0].removeAttribute('checked');