my reverse string function

Function that reverses a string

JavaScript

function reverse_str(myString){
    myString = myString.split('').reverse().join('.');
    return myString;
}
var name="turpin4jums";
console.log("The function returns : " + reverse_str(name));
console.log("The primitive value remains untouched : " + name);

//reverse a string in a object
var me = { name : "Rafael Alfonso" };
console.log("The original value : "  + me.name);
//call anynmous function to modify the name
(function reversePerson(obj){
    obj.name = reverse_str(obj.name);
})(me);
//prints the name again:
console.log("The object has been modified : " + me.name);