I am not able to block the user from editing the Body tag.  I put UNSELECTABLE="ON" on the body tag, but it still lets me edit.  Is that a bug or a limitation?  I also tried creating a 100% height and width DIV on the page and set UNSELECTABLE="ON".  This block editing most of the page, but you can still type under the DIV.

 

I am also working on what rights are necessary for saving the HTML file, but I have not worked that out.

 

UNSELECTABLE Attribute specifies that an element cannot be selected.

 

You need to use the contenteditable property as well.

 

contentEditable sets or retrieves the string that indicates whether the user can edit the content of the object.

 

For example:

 

<div UNSELECTABLE="ON" contenteditable="false" style="border:0px dotted #ff0000;height:20px">This Heading is not editable....</div>

 

 

Hope it helps.