function deleteControlItemOnBackSpace() {
			editor.on('keydown', function(e) {
				var rng;

				if (!isDefaultPrevented(e) && e.keyCode == BACKSPACE) {
					rng = editor.getDoc().selection.createRange();
					if (rng && rng.item) {
						e.preventDefault();
						editor.undoManager.beforeChange();
						dom.remove(rng.item(0));
						editor.undoManager.add();
					}
				}
			});
		}
Deletes the selected image on IE instead of navigating to previous page.