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I’d like to create a form_for statement which allows the user to select elements one-by-one from a drop down menu (or an auto-complete field). As the user selects each item, they should be displayed in list format at the top of the screen. When the user has finished selecting elements, the form can be submitted and the list of selected elements is sent to the receiving controller action.
Can someone tell me how to implement this?
Maybe Chosen is what you need.
Take a look at:
http://harvesthq.github.com/chosen/