code: function _storeStates() {
  
          var moduleName, moduleObj, initialStates = [], currentStates = [];
  
          for (moduleName in _modules) {
              if (YAHOO.lang.hasOwnProperty(_modules, moduleName)) {
                  moduleObj = _modules[moduleName];
                  initialStates.push(moduleName + "=" + moduleObj.initialState);
                  currentStates.push(moduleName + "=" + moduleObj.currentState);
              }
          }
  
          _stateField.value = initialStates.join("&") + "|" + currentStates.join("&");
  
          if (YAHOO.env.ua.webkit) {
              _stateField.value += "|" + _fqstates.join(",");
          }
      }
docs: Stores all the registered modules' initial state and current state.
  On Safari, we also store all the fully qualified states visited by
  the application within a single browser session. The storage takes
  place in the form field specified during initialization.
  
  @method _storeStates
  @private