text: (function(jsGrid, $, undefined) {
  
      var TextField = jsGrid.TextField;
  
      function NumberField(config) {
          TextField.call(this, config);
      }
  
      NumberField.prototype = new TextField({
  
          sorter: "number",
          align: "right",
  		readOnly: false,
  
          filterValue: function() {
              return this.filterControl.val()
                  ? parseInt(this.filterControl.val() || 0, 10)
                  : undefined;
          },
  
          insertValue: function() {
              return this.insertControl.val()
                  ? parseInt(this.insertControl.val() || 0, 10)
                  : undefined;
          },
  
          editValue: function() {
              return this.editControl.val()
                  ? parseInt(this.editControl.val() || 0, 10)
                  : undefined;
          },
  
          _createTextBox: function() {
  			return $("<input>").attr("type", "number")
                  .prop("readonly", !!this.readOnly);
          }
      });
  
      jsGrid.fields.number = jsGrid.NumberField = NumberField;
  
  }(jsGrid, jQuery));
  