IE7 crashes or bad display when hiddent input type is added inside table tag

[eluser]theo_france[/eluser]
Good evening everybody,
I've got a strange problem with my website powered by codeigniter.

My website use the shopping cart cart class.When i add an item to cart the display of the cart is hiddent with a part of my footer.

I don't understand why hiddent input tags makes problem on IE7.

In some cases, those input made IE7 crashes. I don't use scripts like javascript.

If you want to try what's wrong try this.
go to this url : http://tls31.fr/index.php/welcome/sonori...n-toulouse

press one of "je reserve ce pack" that redirect you to the shopping menu called in my case 'reservation'.

Then , if you can use IE7, look what happens.

here you can find the view file http://stikked.com/view/91419306
here the controller : http://stikked.com/view/30893240
and here the function that insert items to cart ; http://stikked.com/view/61825456


I'd like to join a screenshot of the problem, but i don't know how to do.

I want to say, as i'm a beginner developper, i use CI as simply as possible.

Thank you for your help ....