HTML: read only checkbox

Method 1:

<input name="test" type="checkbox" disabled checked/>

Cons: disabled checkbox doesn't send value via POST data

Method 2:

<input name="test" type="checkbox" checked onclick="return false;"/>

Cons: does not work for double-clicks in IE.

Method 3:

<input name="test" type="checkbox" checked onclick="this.checked=!this.checked;"/>

Cons: does not work for double-clicks in IE.