Hey there, I am starting to learn jQUERY and I have a problem with conflict

Hey there, I am starting to learn jQUERY and I have a problem with conflict

I want to build a page with 2 jQUERY, one for a dropdown menu and other for image gallery, but what
happens my dropdown menu freezes... it only start working when I remove the image gallery...
What should I do, I need to have 2 jQUERY on the same page, look at the mess I am doing:
please don't laugh I am just starting to learn ok?
http://pablobianc.dominiotemporario.com/aprimeirophptestes/demo/inicio.php