Javascript: Set the readOnly attribute for input (example explanation)

1. js sets the readOnly attribute for <input>

<textarea name="content" id="content" cols="27" rows="6"></textarea>

var cObj = document.getElementById("content");

cObj.setAttribute("readOnly",'true');

2. Remove the <input>readOnly attribute from js

var cObj = document.getElementById("content");

cObj.removeAttribute("readOnly");

Note: Be sure to pay attention to the case of readOnly! ! !