unobtrusive validation

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.9/jquery.validate.js" type="text/javascript"></script>

<script src="http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.validate.unobtrusive.js" type="text/javascript"></script>
<script src="//kendo.cdn.telerik.com/2015.3.1111/js/jquery.min.js"></script>
  <script src="//kendo.cdn.telerik.com/2015.3.1111/js/kendo.all.min.js"></script>

<form id="myForm" action="/" method="POST">
 
<textarea cols="20" data-val="true" data-val-required="Required field" id="EmailTemplateBody" name="EmailTemplateBody" rows="2" style="width: 100%;" data-role="editor" autocomplete="off" class="k-content k-raw-content" aria-required="true"></textarea>      
        <span class="field-validation-valid" data-valmsg-for="EmailTemplateBody" data-valmsg-replace="true"></span>
<input type="submit" value="Submit"/>
</form>