function make_event_select(id, url, placeholder){
    $(id).select2({
        placeholder: placeholder,
        multiple: true,
        ajax: {

            url: url,
            width: '550px',
            dataType: "json",
            quietMillis: 200,
            multiple: true,

            data: function(term, page, theme){
                return {term: term,
                        page: page};
            },

            results: function (data) {
                var results = [];
                $.each(data, function(index, item){
                    results.push({
                      id: item.id,
                      text: item.label
                    });
                });
                return {results: results};
            }
        },
        initSelection : function(element, callback) {
            var data = [];
            $(element.val().split(",")).each(function(i) {
                var item = this.split(':');
                data.push({
                        id: item[0],
                        text: item[1]
                    });
            });
            callback(data);
            }
        });
}


$(document).ready(function(){
    make_event_select('#id_expositions', '/admin/exposition/search/', 'Выставки');
    make_event_select('#id_conferences', '/admin/conference/search/', 'Конференции');
});