How to open a modal window with form and submit it to itself

[Kingkumar]

Hi,
I need help to do the following as i dont know how to go about it
1. on button click open a modal window
2. modal window has a form with drop down which shoudl have data as what selected in the listbox (multiselect) in the main form
3. when the data is selected in themodal window and submit button is clicked it should display whether the database was updated ( with message update complete) or not ( with message update incomplete)
4. should have a button to close the window

any help in how to go about it or code snippet would greatly be appreciated.

Thanks.

 

[Kingkumar]

Thanks guys,
allan thanks for your time and suggestions they were of great help