Select optgroup in multi select using js

[iamawebgeek]

I have an input with optgroups and multiple turned on. I need to select an parent option (optgroup) using js. I tried to do:

$("#select2").select2("val", $("#select2").data("select2").opts.data[0]); // I got no reaction
$("#select2").select2("val", ["2","3","7"]); // pass all the child ids in array, but it selects all children options

I googled a lot, but didnt found any useful suggestions. My select2 version is: 3.5

[kevin-brown]

This appears to be more of a usage question than a bug report or common feature request. As we continue to keep the Select2 issue tracker geared towards these two areas, bug reports and common feature requests, we are redirecting usage questions to other communities such as the mailing list, IRC, or Stack Overflow.