/**
        *   物件克隆
        **/
        cloneObj : function(obj){
            var This = this;
            obj.Clone = function(){  
                var objClone;  
                if (this.constructor == Object){  
                    objClone = new this.constructor();   
                }else{  
                    objClone = new this.constructor(this.valueOf());   
                }  
                for(var key in this){  
                    if ( objClone[key] != this[key] ){   
                        if ( typeof(this[key]) == 'object' ){   
                            objClone[key] = This.cloneObj(this[key]);  
                        }else{  
                            objClone[key] = this[key];  
                        }  
                    }  
                }  
                objClone.toString = this.toString;  
                objClone.valueOf = this.valueOf;  
                return objClone;   
            }   
            return obj.Clone();
        }