Checbox help

Checbox help

Hello,
I have this code here.  http://jsfiddle.net/max33/8wr7rjLj/ 
I have 3 issues which I can't solve.

1) When a checkbox is unchecked, the all highlights should be clear.
2) I  can't select and highlight more than one parameter.
3) I'd like to have select all and unselect all too.

Can someone help me or guide me. I am a newbie on jquery. thanks.