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