Can't hide ur code

its simply impossible to hide ur code. you can make your code complex in a way that any body who see your code find it hard to understand but you cant prevent user to see it.
obfuscation is help ful which got popularized with Gmail. But GMail's obfuscation isn't intentional, it's a side effect of minifying your javascript to improve speed. Things like JSmin can sometimes cut the size of JS files by half, now imagine if you're Google and you have about 15 million people viewing a page per day, reducing the size of a file by half will significantly reduce badwidth.