I want in my ComboBox to pop up a question everytime a user changes the combo box. It will ask, "Are you sure you want to update" then if the user clicks on yes it will be redirected to another page and if no it will just stay on the same page but the selected value of the combobox will be = "Please select". Is that possible?
See if you can get what you are after incorporating that. It does not give yes/no but provides the same functionality. You could use the prompt box so they enter yes or no, but I would hate that as a user, plus you have to "catch" a lot of different user input possibilities.