TypeError: sally is undefined : <p>Help me please, i have error "TypeError: sally is undefined";
I don`t understand why.</p>

<pre><code>function Person(name,age) {
this.name = name;
this.age = age;
this.species = "Homo Sapiens";
};

var sally = Person("Sally Bowles", 39);
var holden = Person("Holden Bowles", 16);

console.log("sally's species is " + sally.species + " and she is " +  
sally.age);
console.log("holden's species is " + holden.species + " and he is " +   
holden.age);
</code></pre>
