function Person(name, age, height, weight) {
this.name = name.charAt(0).toUpperCase() + name.substr(1);
this.age = age;
this.height = height;
this.weight = weight;
this.sayName = function (){
return "My name is "+ this.name;//$this.name.charAt(0).toUpperCase() + this.name.slice(1);
}
this.bmi = function(){
return "your bmi is: " + parseInt( this.weight/Math.pow(((this.height)/100),2) );
}
}
var amir = new Person('amir', 32, 180, 80);
console.log(amir.name, amir.bmi());