rem: var button = document.getElementById("removeNoPreview"); 
add: button = document.getElementById("removeNoPreview"); 
context: function DoButtonEnabling( treeid ){  var tree = document.getElementById( treeid );  switch( treeid ) {  case "signonstree":    var button = document.getElementById("removeSignon");    break;  case "ignoretree":    var button = document.getElementById("removeIgnoredSite");    break;  case "nopreviewtree":    var button = document.getElementById("removeNoPreview");    break;  case "nocapturetree":    var button = document.getElementById("removeNoCapture");    break;  default:    break;  }  if( button.getAttribute("disabled") && tree.selectedItems.length )    button.removeAttribute("disabled", "true");  else if( !button.getAttribute("disabled") && !tree.selectedItems.length )    button.setAttribute("disabled","true");}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/780f516d61da6ad6d5dc0a4e62f77d0a9bd28daa/SignonViewer.js/buggy/extensions/wallet/signonviewer/SignonViewer.js