rem: var sels = this.mTree.selectedItems; if (sels.length > 0) { 
add: var sel = getSelectedItem(); if (sel) { 
context:   cmdEvalExpr: function()  {    var sels = this.mTree.selectedItems;    if (sels.length > 0) {      var win = openDialog("chrome://inspector/content/viewers/jsObject/evalExprDialog.xul",                            "_blank", "chrome", this, sels[0]);    }  },  
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/b1feb4fe5f4c40136b8dd23982eef6d04d3171a1/jsObjectViewer.js/buggy/extensions/inspector/resources/content/viewers/jsObject/jsObjectViewer.js