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<!DOCTYPE html> <html> <body> Select a fruit and click the button: <select id="mySelect"> <option>Apple</option> <option>Orange</option> <option>Pineapple</option> <option>Banana</option> </select> <button type="button" onclick="myFunction()">Display index</button> <script> function myFunction() { var x = document.getElementById("mySelect").selectedIndex; var y = document.getElementById("mySelect").options; alert("Index: " + y[x].index + " is " + y[x].text); } </script> </body> </html>