//第1种写法 
function Circle(r) { 
   this.r = r; 
} 
Circle.PI = 3.14159; 
Circle.prototype.area = function() { 
 return Circle.PI * this.r * this.r; 
} 

var c = new Circle(1.0);   
alert(c.area());

//第2种写法 
var Circle = function() { 
  var obj = new Object(); 
  obj.PI = 3.14159; 

  obj.area = function( r ) { 
    return this.PI * r * r; 
  } 
  return obj; 
} 

var c = new Circle(); 
alert( c.area( 1.0 ) );

//第3种写法 
var Circle = new Object(); 
Circle.PI = 3.14159; 
Circle.Area = function( r ) { 
    return this.PI * r * r; 
} 

alert( Circle.Area( 1.0 ) );

//第4种写法 
var Circle={ 
  "PI":3.14159, 
 "area":function(r){ 
     return this.PI * r * r; 
    } 
}; 
alert( Circle.area(1.0) );

//第5种写法 
var Circle = new Function("this.PI = 3.14159;this.area = function( r ) {return r*r*this.PI;}"); 

alert( (new Circle()).area(1.0) );

var dom = function(){

  };

  dom.Show = function(){
    alert("Show Message");
  };

  dom.prototype.Display = function(){
    alert("Property Message");
  };

  dom.Display(); //error
  dom.Show(); 
  var d = new dom();
  d.Display();
  d.Show(); //error

var dom = function(){
    var Name = "Default";
    this.Sex = "Boy";
    this.success = function(){
      alert("Success");
    };
  };

  alert(dom.Name);
  alert(dom.Sex);

var html = {
    Name:'Object',
    Success:function(){
      this.Say = function(){
          alert("Hello,world");
      };
      alert("Obj Success");
    }
  };

var html = new Object();
  html.Name = 'Object';
  html.Success = function(){
      this.Say = function(){
          alert("Hello,world");
      };
      alert("Obj Success");

var s = new html.Success();
s.Say();

//还可以写到外面
html.Success.prototype.Show = function(){
  alert("HaHa");
};
var s = new html.Success();
s.Show();

var data= {  
  table : [],  
  tree : {}  
};  

(function(dm){  
  for(var i = 0; i < dm.table.rows; i++){  
    var row = dm.table.rows[i];  
    for(var j = 0; j < row.cells; i++){  
      drawCell(i, j);  
    }  
  }  

})(data);

var CachedSearchBox = (function(){  
  var cache = {},  
    count = [];  
  return {  
    attachSearchBox : function(dsid){  
      if(dsid in cache){//如果结果在缓存中  
       return cache[dsid];//直接返回缓存中的对象  
      }  
      var fsb = new uikit.webctrl.SearchBox(dsid);//新建  
      cache[dsid] = fsb;//更新缓存  
      if(count.length > 100){//保正缓存的大小<=100  
       delete cache[count.shift()];  
      }  
      return fsb;     
    },  

    clearSearchBox : function(dsid){  
      if(dsid in cache){  
       cache[dsid].clearSelection();   
      }  
    }  
  };  
})();  

CachedSearchBox.attachSearchBox("input");

var person = function(){  
  //变量作用域为函数内部，外部无法访问  
  var name = "default";    

  return {  
    getName : function(){  
      return name;  
    },  
    setName : function(newName){  
      name = newName;  
    }  
  }  
}();  

print(person.name);//直接访问，结果为undefined  
print(person.getName());  
person.setName("abruzzi");  
print(person.getName());  

function Person(){  
  var name = "default";    

  return {  
    getName : function(){  
      return name;  
    },  
    setName : function(newName){  
      name = newName;  
    }  
  }  
  };  

  var p = new Person();
  p.setName("Tom");
  alert(p.getName());
  var Jack = function(){};
  //继承自Person
  Jack.prototype = new Person();
  //添加私有方法
  Jack.prototype.Say = function(){
    alert("Hello,my name is Jack");
  };
  var j = new Jack();
  j.setName("Jack");
  j.Say();
  alert(j.getName());