I found this jQuery code which is easy to use, but I can’t find a way to get the selected value. I am using Control 7, and would like to have a button beside that onClick show the values there are selected in the multi-dropdown.
http://labs.abeautifulsite.net/projects/js/jquery/multiSelect/demo/
You can select the checkboxes in the div next to the element you are interested in and map their values to an array: