javascript - Select and open a selectbox with jquery -

i know can focus , select html selectbox drop-down jquery:

<script>     $('#otherbox').on('change', function() {         $("#selbox").focus();         $("#selbox").select();     }); </script> 

but focuses selectbox doesn't open it, still have click on select-element mouse open it.

how can automatically open selectbox event?

there 2 ways it:

• you can either try use mouseevent simulate mousedown (https://developer.mozilla.org/en/docs/web/api/mouseevent + check links in comments)

• or can create invisible div select's options duplicated in right under select , upon click event make div visible, emulating open dropdown.