Fix two small problems on our new website

We've got two (hopefully) small issues on our new website design:

1. There is an autocomplete that works fine in Chrome & Firefox but doesn't work in Internet Exporer. This needs to be fixed so that it works in Internet Explorer

2. The main "search" form only works if the dates are completed. We need it to work even if dates aren't set - I'm guessing this could be as simple as setting a value when something isn't selected?

You can see the code we're using at:

http://www.4hotels.co.uk/cgi-bin/find-new2012a.pl?searchfor=gl52&structured=

and:

http://www.4hotels.co.uk/test/aberdeen.html

The site is live so I can't give you access but you can download the files using your browser "save as" function (you can set a base href on your local copy so that you don't need to download lots of files).

I need to know what you've changed on site - before and after code - so that I don't have to go through line by line to find out what you've done!