I've just been over the code to remind myself how it is done.
In the file that shows the drop down for the font selection, CSS font
sizes are used to keep the font size the same for display purposes.
What is actually passed to the javascript function that changes the
font size is the number. EG. If you select font size 1 then the number
1 is passed to the javascript function to set the font size, not a CSS
number for the font size in pixels.
The javascript function then sends a command to the browsers own API for a font size of '1'
The supported web browsers have their own RTE API built into them by
the makers of the browser to handle RTE features of that browser (
Mozilla have their own Midas API for this)
When the browser is told to change apply a font size each browser
handles this differently, so IE may just put in <font-size=1>
where as Mozilla may convert this to a CSS value.
To put it in short terms, trying to change the font size to the value
of 11px isn't going to be simple as each browser will handle this
differently and you will need to write some code that over-writes the
browsers own handling of font sizes.
I don't know how the various browsers will handle it but you could try the following to get a CSS font size of 11px:-
OnClick="mouseClick('1.5')"