add:  if (!('elementIDs' in this.pageData[aPageTag])) this.pageData[aPageTag].elementIDs = new Object();  if (!('userData' in this.pageData[aPageTag])) this.pageData[aPageTag].userData = new Object();  
context:     getPageData: function (aPageTag)    {      if (!(aPageTag in this.pageData))        this.pageData[aPageTag] = { };      return this.pageData[aPageTag];    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/ad2c14ebc1a2f69a8a616ad31a14f4b7f36e9fde/nsWidgetStateManager.js/clean/toolkit/content/nsWidgetStateManager.js