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			  Java代码           function createCar(color,doors,mpg){      var tempCar = new Object;      tempCar.color = color;      tempCar.doors = doors;      tempCar.mpg = mpg;      tempCar.showCar = function(){          alert(this.color + " " + this.doors);      }      return tempCar;  }         function Car(color,doors,mpg){      this.color = color;      this.doors = doors;      this.mpg = mpg;      this.showCar = function(){          alert(this.color);      };  }        function Car(color,doors,mpg){      this.color = color;      this.doors = doors;      this.mpg = mpg;      this.drivers = new Array("nomad","angel");  }    Car.prototype.showCar3 = function(){      alert(this.color);  };         function Car(sColor, iDoors, iMpg) {      this.color = sColor;      this.doors = iDoors;      this.mpg = iMpg;      this.drivers = new Array("Mike", "Sue");  }    Car.prototype.showColor = function () {      alert(this.color);  };        function Car(sColor, iDoors, iMpg) {      this.color = sColor;      this.doors = iDoors;      this.mpg = iMpg;      this.drivers = new Array("Mike", "Sue");        if (typeof Car._initialized == "undefined") {            Car.prototype.showColor = function () {              alert(this.color);          };            Car._initialized = true;      }  } 
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