Commented Feature: New ComboBox selectedIndexChanged event [27952]

I want to to be able to call a javascript function when the combobox value change but this event doesn't seem to exist for the combobox. The only workaround i found was to use onblur event of the textbox inside the combobox. It works if i type something in the textbox then lost the focus but if i use the button to access the list, the focus stay on the button so the onblus event of textbox cannot be triggered. I know there are events on server side for this but i need this functionnality on client side to implement ajax autosave for individual fields as combobox and textbox. The use of standars <select> is not a solution for me as i need the textbox functionnality of your combobox.
Comments: The title was edited as this issue is included in What's new list for the v16.1 release.