var prototype // In an ActionScript 1 constructor function, the prototype property refers to an object that is the prototype of the constructed class.
function apply(thisObject, argumentsObject) // Specifies the value of this to be used within any function that ActionScript calls. This method also specifies the parameters to be passed to any called function. Because apply() is a method of the Function class, it is also a method of every function object in ActionScript.
function call(thisObject, Parameter) // Invokes the function represented by a Function object. Every function in ActionScript is represented by a Function object, so all functions support this method.