code: function(fo,clear)
      {
          this.filters = fo;
          
          if(this.filters && this.filterFields)
          {
              //Delete filters that doesn't match with any field
              for(var fn in this.filters)
              {
                  if(!this.filterFields[fn])
                      delete this.filters[fn];
              }
              
              for(var fn in this.filterFields)
              {
                  var field = this.filterFields[fn];
                  var value = this.filters[field.filterName];
                  if(Ext.isEmpty(value))
                  {
                      if(clear)
                          this.setFieldValue(field, '');
                  }
                  else
                      this.setFieldValue(field, value);
              }
          }
      }
docs: Sets filter values by values specified into fo.
  @param {Object} fo Object with attributes filterName = value
  @param {Boolean} clear If current values must be cleared. Default = false