easyui ComboBox 中文检索问题

if (opts.editable) {
    /*if (_921.timer) {
     clearTimeout(_921.timer);
    }
    _921.timer = setTimeout(function() {
     var q = t.combo("getText");
     if (_921.previousText != q) {
      _921.previousText = q;
      t.combo("showPanel");
      opts.keyHandler.query.call(_920, q, e);
      t.combo("validate");
     }
    }, opts.delay);*/
    t.combo('textbox').bind("input", function (e) {
              if(_921.timer){
                  clearTimeout(_921.timer);
              }
              _921.timer=setTimeout(function(){
                  var q=t.combo("getText");
                  if(_921.previousText!=q){
                   _921.previousText=q;
                      t.combo("showPanel");
                      opts.keyHandler.query.call(_920,q,e);
                      t.combo("validate");
                  }
              },opts.delay);
          });
   }