First of all, welcome to the forum! There's lots of useful threads on here that are worth looking at. A moderator will probably be along shortly to give you a link to these, as well as the forum rules.
Unfortunately your going to need to do this on your computer unless you can email it to said company. When your normally attach something and upload it to the Internet you get the browse window so you can find the thing you want to attach. Because the iPad doesn't have a file/browse system like this nothing happens and thus what you want to do isn't possible.
The iCab Mobile browser can upload to some sites. I don't know of any way to tell in advance if it will work with your site; so it's a gamble.
That said, you have to copy the file to iCab Mobile before it can be uploaded. Depending on where you have the file stored you may be able to use the Open In option of that app (if it has the option), or mail it to yourself again and use Mail's Open In option for the attachment.
That is how iCab bypasses the iPad's app sandboxing (keeping app data isolated from each other).
Hi, do u guys know why my I pad 2 may say I have the Facebook app, yet doesn't show it, an when I go to app store it says it's already installed, when I can't find it anywhere?!
Hi guys! Me again! Jus checked my memory usage an it seems I have hardly any memory left on my 64gb iPad 2!! Is there any way I can check to see which apps are using most memory space, or see the distribution of memory space between photos, videos etc? Thanks, Julia