Hi,

 

We tested this code, and found IE remove the type='button' automatically:

 

function testit()
{
 var editor=document.getElementById("<%=Editor1.ClientID%>");
 editor.GetDocument().body.innerHTML="<button type='button'>hello</button>";
 alert(editor.GetDocument().body.innerHTML);
}

 

I think that is a bug of IE, and we will think more to find a way to prevent it.

 

Regards,
Terry