What is the difference between:
<input name="TextBox1" type="text" id="TextBox1" readonly="true" />
<input name="TextBox1" type="text" id="TextBox1" readonly="readonly" />
Giving an element the attribute
readonly will give that element the readonly status. It doesn't matter what value you put after it or if you put any value after it, it will still see it as readonly. Putting
readonly="false" won't work.
Suggested is to use the W3C standard.