Box = function(){//构造方法 
	this.state = -1;	//方格状态 
	this.sp = -1;	//精灵号 
} 
if(typeof(Box.prototype.create) == "undefined"){
	Box.prototype.create = function(sp){//创建方格 
		
	};
}
if(typeof(Box.prototype.init) == "undefined"){
	Box.prototype.init = function(){//初始化方格 
		
	};
}
if(typeof(Box.prototype.clear) == "undefined"){
	Box.prototype.clear = function(){//消除方格 
		this.state = -1;
	};
}
if(typeof(Box.prototype.change) == "undefined"){
	Box.prototype.change = function(st){//更改方格
		this.state = st;	
	};
}