Excel Drop Down support on iPad

I have created lots of excel spreadsheets using Microsoft Office on Windows 7 and put them onto my iPad 2. I need to use drop down menus created with Excel on the iPad, but the Numbers app doesn't supports the function. Tha's very annoying.CloudOn app brings Microsoft Word, Powerpoint, and Excel to your iPad. It allows you to use drop down menus. Unfortunately, a small number of people can sign