Easyjet site freeze

I am trying to resolve an issue on a clients PC.
On several sites (including Easyjet) the site "gets stuck" as I try to continue through to the reservation pages.
the error message from the bottom left of ie returns this:

Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; GTB6.6; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; MDDC; OfficeLiveConnector.1.5; OfficeLivePatch.1.3; .NET4.0C; .NET4.0E; BRI/2)
Timestamp: Mon, 11 Apr 2011 07:41:46 UTC
Message: Not implemented
Line: 20
Char: 9
Code: 0
URI: http://www.easyjet.com/scripts/Booking.js

I have checked my virus/firewall protection McAfee and all seams OK. I have tried to change my security settings in i.e and as this is not a HTTPS: site it cannot be added to trusted site.
The site works OK on firefox so therefor I believe it is i.e. specific.  I have changed to allow poipups from this site and no joy.
This leads to the security settings to allow scripts, any suggestions if this is right if so can what settings should I change and can these be set just for one site. if not any other suggestions as how to resolve this.
Simon CrippsOwnerAsked:
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Have you simply cleared your IE cache - Delet temp files history etc etc?
Simon CrippsOwnerAuthor Commented:
Yes all cleared
JAVA up to date?
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First I would reset IE:

Tools - Options - Advanced - Reset

What is your os?
Simon CrippsOwnerAuthor Commented:
Java is updated
ie has been reset
OS is windows 7
browser is i.e.8

This is surely a browser setting issue as works OK on firefox.
However, my clients is able to work the site on a "older pc" but does not work on their new windows 7 pc.
As it is blocking booking.js could there be something in the combination windows 7/i.e8 that prevents this script from running.
Simon CrippsOwnerAuthor Commented:
Easyjet works if compatability view is set.
Therefor issue is with easyjet and they need to get their site updated.

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Well done...
Simon CrippsOwnerAuthor Commented:
Found the solution through a bit of trial and error
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