<!DOCTYPE html>
<html>
<body>
<script>
function person(firstname,lastname,age,eyecolor)
{
this.firstname=firstname;
this.lastname=lastname;
this.age=age;
this.eyecolor=eyecolor;
this.changeName=changeName;
function changeName(name)
{
this.lastname=name;
}
}
myMother=new person("Steve","Jobs",56,"green");
myMother.changeName("Ballmer");
document.write(myMother.lastname);
</script>
</body>
</html>
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