//静态成员的例子
var House = (function(){
	//私有的静态属性
	var numOfHouse = 0;
	//私有的静态方法
	function isValid(hid){
		if( hid!=null && hid! = undefined && hid != ""){
			return true;
		}else{
			return false;
		}
	}

	//返回构造器
	return function(hid,hname,address){
		//私有属性
		var _hid,_hname,_address;
		this.getHid = function(){
			return _hid;
		}

		this.setHid = function(hid){
			if(!isValid(hid)){
				_hid=hid;
			}
		}

		this.getHname = function(){
			return _hname;
		}

		this.setHname = function(hname){
			_hname=hname||"暂无";
		}

		this.getAddress = function(){
			return _address;
		}

		this.setAddress = function(address){
			_address=address||"暂无";
		}

		numOfHouse++;
		if(numOfHouse>2)
		throw new Error("House:Only 2 House can be created");

		this.setHid(hid);
		this.setHname(hname);
		this.setAddress(address);
	};
})();

//公共的静态方法
House.washWindow = function(){
	alert("Window Washed!");
}

//Public ,non-privileged method
House.prototype = {
	showHouse : function(){
		document.getElementById("container").innerHTML+="静态楼盘："+ this.getHname()+"<br />";
	}
}

//静态方法调用
function staticHouse(){
 try {
 var staticHouse1= new House('123','HouseName -第一个','Beijing');
alert(staticHouse1.getHname());
staticHouse1.showHouse();
 var staticHouse2= new House('123','HouseName -第二个','Beijing');
alert(staticHouse2.getHname());
staticHouse2.showHouse();
 var staticHouse3= new House('123','HouseName','Beijing');
}
 catch (e){
alert(e);
}
}

//常量的简单示例
var Class=( function (){
  var CLASSNAME="I'm Jack!";
  var CREATEDATE="I'm born on Sep 10!";
  var HOMETOWN="I'm from北京";

  var constants={
    HEIGHT:100,
    WIDTH:400
  }

  this.getName= function (){
    return CLASSNAME;
  }

  this.getConstants= function (name){
    return constants[name];
  }

  return  function (){
    this.showName= function (){
      alert(getName());
  };

  this.showConstant= function (name){
    alert(getConstants(name));
  }
};
})();

function useConstant(){
	var cl= new Class();
	cl.showName();
	cl.showConstant("HEIGHT");
}