User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.3) Gecko/20040910 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.3) Gecko/20040910 A form element like <input checked readonly="true" name="pA1A" id="pA1A" type="checkbox" /> can be changed. Readonly only works for input of type text and textarea. Accoring to the HTML 4.01 Specification: "The following elements support the readonly attribute: INPUT and TEXTAREA." So readonly should apply to checkboxes and radio buttons too. (IE also doesn't prevent readonly checkboxes and radion buttons to be changed. However, HTML 4.01 doesn't describe how to make <select readonly.) Reproducible: Always Steps to Reproduce: 1. 2. 3. Actual Results: Click on the checkbox and it will change Expected Results: Ignored the click

*** This bug has been marked as a duplicate of 88512 ***