How to keep the current value in select input type while adding other options

e8416o8

If I make a field type as "select", then the current value for that field got lost in edit window.
Which way would be the best way to keep the current value but add new values as options?

Thanks,
Karen

e8416o8

I added the following codes in open/edit event. It seems to work as I wanted.

        $.ajax ({
            type: 'POST',
            url: '/myPayers/GetInsCoLst',
            dataType: 'json',
            success: function (data) {            
                editor.field('insCo').update(data.options.insCo);
            }          
        });

            if (data.insCo.val != NULL) {
                editor.field('insCo').update(data.options.insCo);
            }