| <!DOCTYPE html> | |
| <form> | |
| <input id="in1" type="checkbox" required> | |
| <input id="in2" type="checkbox" required checked="true"> | |
| </form> | |
| <script> | |
| function go() { | |
| document.getElementById('in1').checked = true; | |
| document.getElementById('in2').checked = false; | |
| } | |
| </script> |