function Animal(type, legs) {  

  this.type = type;

  this.legs = legs;  

  this.logInfo = function() {

    console.log(this === myCat); // => false

    console.log('The ' + this.type + ' has ' + this.legs + ' legs');

  };

}

var myCat = new Animal('Cat', 4);  

// logs "The undefined has undefined legs"

// or throws a TypeError, in strict mode

setTimeout(myCat.logInfo, 1000);