// 绑定新闻类型下拉

function news_type() {

    var news_type=$("#news_type").val();

    $(".remove").remove();

    $.ajax({

        url : path + "/base/newsType",

        type : "POST",

        data : "json",

        success : function(data) {

            var html = '';

            for (var i = 0; i < data.length; i++) {

                var checked="";

                //如果id等于value，则选中

                if(data[i].id==news_type){

                    checked="selected=\"selected\"";

                }

                html += "  <option "+checked+" class='remove' value='" + data[i].id + "'>"

                        + data[i].name + "</option>";

            }

            $(".news_type").append(html);

        },

        erro : function(e) {

            $.messager.alert("提示", "错误！", "error");

        }

    });

}

<select class='news_type'></select>