Enabling/Disabling TinyMCE from View/Server side and Setting Content back into DIV

My Question is,

I have simplified my question more. How to use below code in server side or in view. Is there any workaround like @Html.IsAdmin than mceAddControl should call otherwise mceRemoveControl.

function toggleEditor(id) 
{
    if (!tinyMCE.get(id)) {
        tinyMCE.execCommand('mceAddControl', false, id);
    }
    else {
        tinyMCE.execCommand('mceRemoveControl', false, id);
    }
}

Second Question is, In below case I have TextArea

<textarea id="contentDiv" rows="15" cols="100" style="width:100%">@Model.Page.Html</textarea>

I have saved HTML in DB from above TinyMCE TextArea like b开发者_C百科elow in DB

tinyMCE.get('contentDiv').getContent()

How I set DB HTML content back into TextArea. I want this in View/Server side without using JavaScript

Like I saved

Testing
Testing

in DB saved
Testing<br />
Testing

but when I set the content back in TextArea I see Testing

Testing with HTML Tags.

I hope you understand my Question