I cant test the code rigth now but maybe this post by kyttias can help you:
http://www.mysidiaadoptables.com/for...51&postcount=6
The post is for limiting the owned eggs but i know it can help you ^^ if you move your code like the one in the post the user wont see the adopts, if you still want to show the eggs but make the user unable to adopt, you need to copy the random code and paste it in the else you dont have money, but removefrom radio to value and the newbutton adopt me, submit.
If i dont make sense and you can wait a little tomorrow i will post how i did it :)