jquery send/remove checkbox values to/from textarea field onclick

Using jquery - how can I check my various checkboxes, have the checked value go to a textarea field - this field will be hidden on the actual form.  of course, if the field is uncheck, then that value should be removed from the textarea field.

here is a cleaned up fiddle as an example:

http://jsfiddle.net/justmelat/75nxA/

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if I check banana, orange and peach, -->banana, orange, peach should appear in the text field. if I uncheck orange then banana, peach should appear