37-2.js

java应用代码和章节代码。各种功能实现效果。很值

// generic appender
function attachToEnd(theNode, newTag) {
 try {
  var newElem = document.createElement(newTag);
  theNode.appendChild(newElem);
 }
 catch (e) {
  switch (e.name) {
   case "INVALID_CHARACTER_ERR" :
    statements to handle this createElement() error
    break;
   case "HIERARCHY_REQUEST_ERR" :
    statements to handle this appendChild() error
    break;
   case "WRONG_DOCUMENT_ERR" :
    statements to handle this appendChild() error
    break;
   case "NO_MODIFICATION_ALLOWED_ERR" :
    statements to handle this appendChild() error
    break;
   default:
    statements to handle any other error
   }
  return false;
  }
 return true;
}