In IE, the checked attribute of radio or checkbox cannot be selected and displayed in the initial state _ javascript skills

The checked attribute cannot be correctly implemented in IE. in IE, when using checkbox or radio, you may find that the CheckBoxObject cannot be used sometimes. checked = true or CheckBoxObject. the setAttribute ('checked', true) method causes the checkbox or radio to be pre-selected.
To solve this problem, you can use the checkultchecked attribute of checkbox or radio to set the defaultChecked attribute to true. The specific implementation is CheckBoxObject. setAttribute ('defaultchecked', true) or CheckBoxObject. defaultChecked = true, so that checkbox and radio can be selected in IE in the initial state.
Example:

The Code is as follows: