I have a form with dropdown and listboxes.
I'm using these to allow the user to filter the results they will see on a grid. There are 1000s of codes and the user may want to see 1 or 2. Therefore they select what they want from the dropdown box and add to the listbox.
When the user selects an item from the drop down box it must be added to the listbox and removed from the dropdown box. When a user selects an item and presses another button underneath the listbox the selected item must be removed from the listbox and added to the dropdown box.
I've tried these 2 sites.
The problem with the first is that the listbox is cleared after postback. Also when items are removed from the listbox they are not removed from the hidden field.
The problem with the second is that it adds information from a textbox not a dropdown box.