javascript - How is it possible to run a jQuery function with an variable instead of an id? -

how possible run jquery function this:

$('#do here variable').trigger('click'); 

with variable contains id string like: var demoid = "idx";

so how should correct syntax been written?

a try of me this:

function doitlikeaclick(){ var demoid = "idx"; $(demoid).trigger('click');} 

but not work. javascript stopp.

yes

$('#' + demoid).trigger('click');