KendoUI的下拉框展示图片功能

<script>
                $(document).ready(function() {
                    var autocomplete = $("#customers").kendoAutoComplete({
                        minLength: 1,
                        dataTextField: "ContactName",
                        headerTemplate: '<div class="dropdown-header k-widget k-header">' +
                                '<span>Photo</span>' +
                                '<span>Contact info</span>' +
                            '</div>',
                        footerTemplate: 'Total #: instance.dataSource.total() # items found',
                        template: '<span class="k-state-default" style="background-image: url(\'../content/web/Customers/#:data.CustomerID#.jpg\')"></span>' +
                                  '<span class="k-state-default"><h3>#: data.ContactName #</h3><p>#: data.CompanyName #</p></span>',
                        dataSource: {
                            transport: {
                                read:{
                                    dataType: "jsonp",
                                    url: "https://demos.telerik.com/kendo-ui/service/Customers"
                                }
                            }
                        },
                        height: 400
                    }).data("kendoAutoComplete");
                });
            </script>
在于这段代码
    headerTemplate: '<div class="dropdown-header k-widget k-header">' +
                                '<span>Photo</span>' +
                                '<span>Contact info</span>' +
                            '</div>',