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();

Answer 1

are you looking for this

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

Answer 2

Programatically triggering a click event will only run the defined click handler for that element. As you say in the comments, you have no such method defined, therefore no action will take place.