Create pop up message when specific field data is selected from a drop down list.
I have a field in my layout called "Account Status". This is a drop down list field with several items on its value list. I would like to create a very small pop up window (about 2 x 2 size) that will appear on top of the layout next to the field the user is on but only when a user selects certain items from the value list of the field. For example: If user is in the field and selects "Open", nothing happens and can move on. If the user selects "Closed" on that field, then a small pop up window appears stating something like "Please be sure that you have completed..blah blah blah" to which the user can exit the pop up window (via a closed button in its corner) and will be back to the field they were left at on the layout.
Is this possible?