How to trigger the HTML Select onClick event (activates select dropdown with options)

Question

I want to know how to trigger the onClick event of any select(html combobox element).

I tried to do $('#MySelect').click(); using jQuery and tried document.getElementById('MySelect').click(); using pure javascript.

But the two don't fire the dropdown event that have the options of the select.

Ps: i have sure that selector $('#MySelect') exists.

Answer 1

are you looking for this

  document.getElementById("MySelect").selectedIndex=3;