Get HTML Editor propertie

Hi

Following the example from ajax source code, i have setup a custom button to my toolbar and 2 new properties.

property 1 defines if button shows or not ( working ok ) , and property 2 would be a string value. the propertys are defined when adding the control to the form.

How can i get this value from propertie 2 in the javascript code block in the file that i defined for the button?

thanks

rui