How to Use ScriptManager.RegisterClientScriptBlock from Javascript
<p>I want to use </p>

<pre><code>ScriptManager.RegisterClientScriptBlock(ctrlName, Page.GetType(), "msg", _script, false)
</code></pre>

<p>from Javascript function in</p>

<pre><code>OnClientClick="CheckMaxLength(this);"
</code></pre>

<p>of TextBox. I want to show my custome PopUp.I am able to use it in .cs but I want it to use inside JavaScript.</p>
