some_object["string_containing_method_name"]();

如果你想玩全局变量，那么只要记住它们都是 window object。

If you want to play with globals, then just remember they are all properties of the window object.

...但不要使用全局。

您的特定示例：

var $classname = "klasse";
var $class = new window[$classname]();

（显然，在机器生成的代码中只使用$的常规约定也应该适用）

(Obviously, the usual conventions for only using $ in machine generated code should apply too)