How can I prevent the user from being able to resize an image in designMode? (disable the handles when image is clicked)
Say you turn contentEditable on like this:
document.body.contentEditable = true;
All you have to do is turn it off for all (or some) images.
var imgs = document.getElementsByTagName("IMG");
for (var i = 0; i < imgs.length; ++i) {
imgs[i].contentEditable = false;
}