I want a <select> element to respond differently to an enter key stroke depending on whether the dropdown is currently open or closed.

Is it possible to detect when a <select> element has the drop down list has opened or closed using JavaScript? Something like this, perhaps:

<select name="selExample" onChoicesOpen="console.log('opened');" onChoicesClosed="console.log('closed');"> 

Or is there a way to determine if the dropdown is open using Javascript. Maybe something like:

$("#selExample").isDropDownOpen()

I'm OK if there is a solution that only works in Chrome (don't need IE support). I'm OK if the solution requires a library such as jQuery or something else.