删除搜索选项过滤器jqgrid

我尝试设置几个过滤器来搜索:

$.jgrid = {
 search : {
  caption: "Search...",
  Find: "Find",
  Reset: "Reset",
  odata : ['equal', 'not equal'],
  groupOps: [ { op: "AND", text: "all" }, { op: "OR",  text: "any" } ],
  matchText: " match",
  rulesText: " rules"
 }};

但我不能让它工作。它仍然列出选项值上具有“未定义”值的所有筛选器。有什么想法吗?.