function getpage(_page, _queryon) {            $("#norecord").html("");//清空无记录信息            $.post("GetRoles", { page: _page, queryon: _queryon },              function (re) {                  var re = eval(re);                  currentpage = re.currentpage;                  totalpage = re.totalpage;                  totalrole = re.totalroles;                  $("#roletable").datagrid({                      columns: [[                           { title: "角色名", field: "RoleName" }                         , {title: "角色描述", field: "RoleDescription" }                             ]]                  }).datagrid("loadData", { rows: re.data });                                   }              }// function of call back               );//post to get page        };