Click anywhere in the blue area to get event.pageX and event.pageY values:

=== Bug Note ===

In Internet Explorer 10 that came with Windows 8 RTM, event.pageX and event.pageY both have incorrect values:

Instead of returning the mouse position relative to the document's Left/Top, the values returned are relative to the IE10 viewport's Left/Top.

To reproduce this problem, simply scroll a page half way to the right and half way down, move mouse around and you can see the incorrect values returned.

NOTE: tested using jQuery 1.7.2 and 1.8.0, both have this problem. Test was done using a HTML5 doctype, didn't test older doctypes.