¹ØÓÚjavascriptµÄÖØÔØ - Web ¿ª·¢ / JavaScript

ÇëÎÊÕâÑùµÄ»°×ÓÀ಻ÊǸù¾Ý²ÎÊýÁбíµÄ²»Í¬ÖØÔØÁËa·½·¨Â𣿣¿
µ«ÊÇΪʲôÊä³öÊÇChild Method count undefined ÄØ£¿£¿
²»ÊÇÓ¦¸Ã¸ù¾Ý²ÎÊýÁбíµÄ²»Í¬µ÷ÓÃÁË´Ó¸¸Àà¼Ì³ÐµÄa·½·¨£¬Êä³öParent Method countÂ𣿣¿
ÇëÖ¸½Ì£¡~~
function Parent() {
   
  this.a=function(){
  alert("Parent Method count");
}}

Children.prototype = new Parent();

function Children() {
  this.a = function(cc) {
  alert("Child Method count" + cc);
  }
  }


var c = new Children();


c.a();

---

JavaScriptÏÂûÓÐÖØÔØ£¬ÕâÑùдÊÇ°ÑParentµÄº¯Êý¸²¸ÇÁË¡£

ÒªÖØÔØÐèÒª×ÔÒÑ×öЩ´¦Àí```

---

ÒòΪÄãдµÄ×ÓÀàa()·½·¨¸²¸Ç¸¸ÀàµÄa()·½·¨£¬
ֻҪעÊ͵ô×ÓÀàa()·½·¨¾Í¿ÉÒÔÁË¡£

   
  this.a=function(){
  alert("Parent Method count");
}}

Children.prototype = new Parent();

function Children() {
/*
  this.a = function(cc) {
  alert("Child Method count" + cc);
  }
*/
  }


var c = new Children();


c.a();

---

function Parent() {
   
  this.a=function(){
  alert("Parent Method");
}}

Children.prototype = new Parent();

function Children() {

  this.b = funct