Insert an hidden character in text string using JavaScript
<p>How to use an hidden character in text string using JavaScript.There is one text string which i read and writes back with the hidden character in it (so rewritten text looks same as the original text though it comtains the hidden character), so that next time i read the text i can come to know that this text is aleady read as it contains the hidden character</p>

<p>Eg)</p>

<pre><code>&lt; html&gt;
&lt; body&gt;
&lt; div&gt;
This is a simple text
&lt; /div&gt;
&lt; /body&gt;
&lt; /html&gt;
</code></pre>

<p>I am trying to parse the div and extract the contents of the div, and insert an hidden character to the text and rewrite the text to the div again using JavaScript.</p>

<p>I just want to know which hidden character should i use to insert into the text ?
How to write the hidden character into the text ?</p>
