方法一：

var Person = (function() {
    var name;
    return function(firstAndLast){
      name=firstAndLast;
      this.getFullName=function(){
        return name;
      };
      this.getLastName=function(){
        var arr=name.split(" ");
        return arr[1];
      };
      this.getFirstName=function(){
        var arr=name.split(" ");
        return arr[0];
      };
      this.setFirstName=function(first){
        var arr=name.split(" ");
        arr[0]=first;
        return name=arr.join(" ");
      };
      this.setLastName=function(last){
        var arr=name.split(" ");
        arr[1]=last;
        return name=arr.join(" ");
      };
      this.setFullName=function(firstAndLast){
        return name=firstAndLast;
      };
    };    
})();


var bob = new Person('Bob Ross');
bob.getFullName();

方法二：

var Person = function(firstAndLast) {
    var arr = firstAndLast.split(' '),
        first = arr[0],
        last = arr[1],
        fullName = firstAndLast;
    this.getFirstName = function(){
      return first;
    };
    this.getLastName = function(){
      return last;
    };
    this.getFullName = function(){
      return fullName;
    };  
    this.setFirstName = function(f){
      first = f;
      fullName = first + ' ' + last;
    };
    this.setLastName = function(l){
      last = l;
      fullName = first + ' ' + last;      
    };  
    this.setFullName = function(fn){
      arr = fn.split(' ');
      fullName = fn;
      first = arr[0];
      last = arr[1];
    }; 
};


var bob = new Person('Bob Ross');
bob.getFullName();