function Note(name, text)
{
    this.name = name;
    this.text = text;

   function displayNote()
    {
       alert(this.text);
    }
}

var note = new Note("a", "c");
alert(note.displayNote);

function Note(name, text)
{
    this.name = name;
    this.text = text;

   function displayNote()
    {
       var self = this;
       alert(self.text);
    }
}

var note = new Note("a", "c");
alert(note.displayNote);

function Note(name, text)
{
    this.name = name;
    this.text = text;

    this.displayNote = function()
    {
       alert(this.text);
    }
}

var note = new Note("a", "c");
note.displayNote();// it will automatically alert. Otherwise you'll have two alerts. The second one being undefined.

this.displayNote = function()
{
   alert(this.text);
}

note.displayNote(); // Note the brackets to call.

alert(note.displayNote);

note.displayNote();

<script language="javascript" type="text/javascript">
<!--

person = new Object()
person.name = "Tim Scarfe"
person.height = "6Ft"

person.run = function() {
    this.state = "running"
    this.speed = "4ms^-1"
}

//-->
</script>