rem: var tree = document.getElementById("moduleList"); 
add: var listbox = document.getElementById("moduleList"); 
context: function enableAdvance(){  var tree = document.getElementById("moduleList");  var nextButton = document.getElementById("forward");  if (tree.selectedItems.length)    nextButton.removeAttribute("disabled");  else    nextButton.setAttribute("disabled", "true");}
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/d38a0937d9c93a0a9d913e2ac781e4328bb8cc73/importDialog.js/buggy/mailnews/import/resources/content/importDialog.js