Date.compare is not a function

```
What steps will reproduce the problem?

var astart = Date.parse('2011-01-01 ' + $('#' + a).data('apptdata').starttime);
var bstart = Date.parse('2011-01-01 ' + $('#' + b).data('apptdata').starttime);
return Date.compare(bstart,astart);

What is the expected output? What do you see instead?
Expected output is -1, 0, or 1, as stated in dox.

What version of the product are you using? On what operating system?
* Version: 1.0 Alpha-1
* Build Date: 13-Nov-2007

FF on WinXP

Please provide any additional information below.

```

Original issue reported on code.google.com by `flatulen...@gmail.com` on 21 Aug 2011 at 4:33