error javascript en firefox

[hgoncalves]

hello.

Have you resolve that problem? How you do it?
I have the same problem, please see:

<script type="text/javascript">

function MyObject(MyID, Name){
this.MyID=MyID;
this.Name=Name;
};
function MyObject.prototype.MyFunction() {
return this.MyID;
};

var o = new MyObject(1, 'Item 1');

alert(o.MyFunction());

</script>

It work's fine on IE 7
Any solutions? Very Thanks!