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????Select2????????

????Select2???????????????????JavaScript???????????????

??Select2?Id???

???????

?????

function chooseSelect2All(select_id) {
    var item = document.getElementById(select_id);
    var item_jq = $('#'+select_id);
    var option_list = [];
    for(var i=0; i < item.length; i++){
        var optionVal = item[i].getAttribute('value');
        option_list.push(optionVal);
    }
    item_jq.val(option_list).trigger("change");
}

???

• document.getElementById????HTML???

• ??????????option????????

• ??$('#id)?????jQuery??

• ??.val(option_list).trigger("change");?????

?????????Select2?????????????select_id????????