| A form control in initially disabled fieldset: | |
| PASS control1.willValidate is false | |
| Then, enables the fieldset: | |
| PASS document.getElementById("f1").disabled = false; control1.willValidate is true | |
| A form control in initially enabled fieldset: | |
| PASS control2.willValidate is true | |
| Then, disables fieldset: | |
| PASS fieldset2.disabled = true; control2.willValidate is false | |
| Detach the form control from the fieldset: | |
| PASS fieldset2.removeChild(control2); control2.willValidate is true | |