Internet explorer 7 + 8 animate error

[anonymous]

In IE7 and IE8 i get the follwing error:

Message: Invalid argument. Line: 144 Char: 219 Code: 0 URI: ​http://www.rugbyunion.org.uk/javascript/jquery1.4.2.js

here is the url to the page: ​http://www.rugbyunion.org.uk/click_overlay/animate_error.php

[dmethvin]

Can you provide a test case that is reduced a bit more?

[addyosmani]

The code provided has been reproduced here ​http://jsfiddle.net/addyosmani/YEQUu/show/ but we really need you to reduce this further. Ideally, strip out any of the app-specific logic down to the point where we can see exactly what is causing an error in your page.

[addyosmani]

This appears to be another one of the tickets our bot forgot to automatically close after 2 weeks of no-response. I've been looking through your code again and the reason you're running into issues is likely because dlgTop (which you're using as the value in conjunction with .animate()) may not be getting correctly computed or calculated in IE. Perhaps take another look at this part of your code. As you haven't been able to reduce your test case down to a point where we can further confirm whether there is in fact a jQuery core issue we'll be closing this ticket. Feel free to comment back with a test case we can use if you would like this further chased up.