What is need to do that Textarea from tiny_mce has worked on page ascx. That work on page aspx in MVC. Page ascx is
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="CreateArticle.ascx.cs"
<script type="text/javascript" src='<%= Url.Content("~/Scripts/tiny_mce_src.js") % >'></script>
<%using (Ajax.BeginForm("CreateArticle","Home",new AjaxOptions {
UpdateTargetId = "content"})){ %><div>
<%= Html.TextArea("body", new { style = "height: 500px" })%></p>
<script type="text/javascript" language="javascript">
tinyMCE.init({
mode : "textareas",
theme : "advanced"
});</script>