​x
 
<html>
<body>
​
<script type="text/javascript">
​
function Car(sColor,iDoors,iMpg) {
  this.color = sColor;
  this.doors = iDoors;
  this.mpg = iMpg;
  this.showColor = function() {
    document.write(this.color);
  };
}
​
var oCar1 = new Car("red",4,23);
var oCar2 = new Car("blue",3,25);
​
oCar1.showColor();
document.write("<br />")
oCar2.showColor();
​
</script>
​
</body>
</html>
​