what is wrong here? PLEASE HELP I'M GOING TO LOOSE MY HEAD

Question

function simo(name,age){
this.name= name;
this.age= age;
this.change= function(ugo){
this.name=name;
}
}

var x= new simo("simo",18);
x.change("lol");
alert(x.change);

Answer 1

OMG DON'T LOSE YOUR HEAD!!!
HERE'S THE ANSWER:

function simo(name,age){
this.name= name;
this.age= age;
this.change= function(ugo){
this.name=name;
return this.name;
};
}

var x= new simo("simo",18);
alert(x.change("lol"));