Implementation of two inheritance mechanisms of JScript

The inheritance of JScript can be implemented in two ways: the prototype attribute of the object and the call function. The first method also applies to Javascript, and the second method only applies to JScript. The following example shows the inheritance implemented using prototype: var person = function (){

This. Name = "person ";

} VaR _ p = person. Prototype; _ p. getname = function (){

Return this. Name;

}

_ P. setname = function (name ){

This. Name = Name;

} Var Jeffrey = function (){

This. Name = "Jeffrey"; this. Say = function (Word ){

Alert (Word );

}

} _ P = Jeffrey. Prototype = new person (); // implement inheritance

_ P. Say = function (Word ){

Alert (Word );

} Code Tested: var Jeffrey = new Jeffrey (); alert (Jeffrey. getname (); // call the parent object definition method Jeffrey. setname ("Jeffrey he"); // call the method alert (Jeffrey. getname (); Jeffrey. say ("hello"); then let's look at the example of using the call function: function person () {This. name = "person"; this. getname = function () {return this. name;} This. setname = function (name) {This. name = Name ;}} function Jeffrey () {person. call (this); // implement the inheritance of this. name = "Jeffrey"; this. say = Fu Nction (Word) {alert (Word) ;}} the test code is the same as above.