Multiple Custom Buttons

Try to reformulate your question.

1. I have 5 custom buttons - Update Status, Update priority, Update Location, Update Folder, Update Tag
   
2. Instead of having 5 buttons (I may add more buttons later) in a single row, can I instead convert this to a Drop Down list and let the Javascript be executed when the option is selected?
   One more help...
   
   In a custom button, how can get user input?
   
   For e.d. on a list_view page, I want to update few records as follows:
   
   Change Due Date for records selected and ask the user to enter a new date in a msg box.
   
   How do I achieve this?

You can use a javascript prompt box. Check this link for more info.