Triggering "change" with jQuery with multiple selectors

Question

I'm trying to trigger a "change" event on two different selectors using jQuery, but for some reason, when I do this, only the first selector actually seems to trigger the event.

This is what I'm doing:

jQuery(first_field).trigger('change');
jQuery(second_field).trigger('change');

I want to do this because I have functions for the change events on selector_1 and selector_2 that disables certain input fields in a form. The way that I'm assessing that the second change event isn't being triggered is by the fact that those input fields are not being disabled.

I know the disabling functions work and the jQuery .change events work because if I simply change the form using my mouse, the functions behave as I expect.

Update:

Here is the enable/disable code:

function disable_field(s) {
    if ($(s).disabled != true) {
        $(s).disabled = true;
        /* Reset text value */
        if ($(s).type == "text") {
            $(s).value = "";
        /* Reset selected value */
        } else if ($(s).type == "select-one") {
            $(s).selectedIndex = 0;
        }
    }
}
function enable_field(s) {
    if ($(s).disabled != false) {
        $(s).disabled = false;
    }
}

Note that this code is being used with Qualtrics; survey software that allows you to put JS along with your questions. They have their own selector assigned to $() which only allows ids.

Here is the .change code:

    jQuery(first_field).change(function() {
        /* Parse id */
        var the_id = this.id;
        var this_question = the_id.slice(-1);
        the_id = the_id.substring(0, the_id.length - 3);
        /* Create selectors */
        var selector2 = the_id + '2~' + this_question;
        var selector3 = the_id + '3~' + this_question + '~1~TEXT';
        /* Handle toggle */
        if (this.selectedIndex == 1) { 
            disable_field(selector2);
            disable_field(selector3);
        } else {
            /* Account for value of second_field */
            if ($(selector2).selectedIndex != 1;) {
                enable_field(selector3);
            }
            enable_field(selector2);
        }
    });

    jQuery(second_field).change(function () {
        /* Parse id */
        var the_id = this.id;
        var this_question = the_id.slice(-1);
        the_id = the_id.substring(0, the_id.length - 3);
        /* Create selectors */
        var selector3 = the_id + '3~' + this_question + '~1~TEXT';
        /* Handle toggle */
        if (this.selectedIndex == 1) { 
            disable_field(selector3);
        } else {
            enable_field(selector3);
        }           
    });

Answer 1

Try using .add()

$(selector_1).add(selector_2).trigger('change');