JavaScript获取当前运行脚本文件所在目录的方法

DirectoryUtility = {
  // function getCurrentDirectory: returns currentDirectory path 
  // with a trailing backslash.
  getCurrentDirectory : function ( ) {
    var scriptFullName = WScript.ScriptFullName;
    var scriptName = WScript.ScriptName;
    return scriptFullName.substr ( 0, scriptFullName.lastIndexOf ( scriptName ) );
  }
}
/* 用法 */
DirectoryUtility.getCurrentDirectory ( );