How do you hook up wii and DVD with only one AV on tv?

usually if you only have one av hookup on your tv you have to leave the specified DVD Player and Nintendo Wii plugged in and transfer the cords everytime you want to watch or play one and not the other..you are not able to hook both of them up at the same time..unless you have more AV outlets on the back of your tv...check there and if that doesnt work see the above plan(: