plugin.isContentEditable
The 'isContentEditable' function tests if the current HTML content is editable.
- Prototype: plugin.isContentEditable(iDbPos);
 - Parameters:
- iDbPos: a position number (0-based) of the database on the tab control; -1 for the current database.
 
 - Return Value: true is returned if editable, or false if readonly.
 - Example: 
plugin.isContentEditable(-1);