[КЛ@ВИШ_nick]

function Animal(name) {
    this.name = name ;
}
Animal.prototype = {
    sayName: function() {
        alert(this.name) ;
    },
    sayHi: function() {
        alert("Hi!") ;
    }
} ;
var dog = new Animal("dog"),
    cat = new Animal("cat") ;
dog.sayName() ;
cat.sayName() ;
dog.sayHi() ;
cat.sayHi() ;