javascript 中的继承方法

1.可以通过prototype属性，实现继承方法的方式，这种方式就是java语言中继承的变换形式。
 // Create the constructor for a Person object
function Person( name ) {
    this.name = name;
}
// Add a new method to the Person object
Person.prototype.getName = function() {
    return this.name;
};
Person.prototype.setName = function(name) {
    this.name = name;
};
// Create a new User object constructor
function User( name, password ) {
    // Notice that this does not support graceful overloading/inheritance
    // e.g. being able to call the super class constructor
    this.name = name;
    this.password = password;
};
// The User object inherits all of the Person object's methods
User.prototype = new Person();
2.通过自己写继承函数，实现继承，下面这段代码也很好，值得一看
// A simple helper that allows you to bind new functions to the
// prototype of an object
Function.prototype.method = function(name, func) {
    this.prototype[name] = func;
    return this;
};
// A (rather complex) function that allows you to gracefully inherit
// functions from other objects and be able to still call the  'parent'
// object's function
Function.method('inherits', function(parent) {
    // Keep track of how many parent-levels deep we are
    var depth = 0;
    // Inherit the parent's methods
    var proto = this.prototype = new parent();
    // Create a new 'priveledged' function called 'uber', that when called
    // executes any function that has been written over in the inheritance
    this.method('uber', function uber(name) {
        var func; // The function to be execute
        var ret; // The return value of the function
 &n