Is there some way to check functionality in different browsers without downloading them all ?

You can get a subscription to a service : https://www.browserstack.com/pricing
But if you start with Chrome, Firefox and IE, Safari (for Mac) and whatever phones and tablets/pads you have – you'll have a pretty good idea if your code is up to par.
I post stuff in the Design & Content Review forum here since I don't have any Mac/Apple devices. CC forum members are always willing to help out, they'll take a look with whatever devices/browsers they have and report back so you know if you need to change something.

where is the CC forum ? I don't see it.

I guess the reference is to http://www.coffeecup.com/forums/website-design--content-reviews/.

Frank

Thanks, Frank, I forgot the link.