Template:Function Constructor
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<source lang="javascript"> // Colorized is a constructor. function Colorized(name, favoriteColor) {
this.name = name; this.favoriteColor = favoriteColor;
}
// c is an instance of Colorized. var c = new Colorized("Mary", "red"); alert(c.toString()); </source> A toString method is available on every native object. This is because toString is defined on Object.prototype and Object.prototype is at the base the prototype chain.