Boonex Dolphin Web Developer CSS PHP Javascript Tasks

We're seeking assistance with our boonex dolphin site: uploadyourdog.com

We're seeking assistance with javascript tasks: 
http://uploadyourdog.com/m/avatar/ unable to select any avatars under the site avatar bar
http://uploadyourdog.com/mail.php?mode=inbox unable to delete a message, report a message, mark a message and mark a message unread
http://uploadyourdog.com/m/videos/view/Talking-Dogs-Want-My-Mama remove the brown background that comes over the video

Css tasks:
http://uploadyourdog.com/browse.php Replace  avatar with the appropriate dog avatar. If the person with the avatar is a female, replace with a female dog avatar. If the appropriate dog is a male replace it with the male dog avatar.

Replace the couple avatar http://uploadyourdog.com/search.php?search_mode=simple&csrf_token=pU%21%3Fa8DUCe%2FUqHAV%262Vu&NickName=garrettvander52&ID=&submit=Search with http://www.thepersonaldevelopmentguy.com/image-files/cartoon-hearts-dog-cat-valentines-pink-heart.gif