changing the background of this box, hard to explain.. Options

[kill me please]

ok this is hard to explain and there might be a code for it in the scripts but i dont know what to call it so didnt find it.
ok you know in the posting calendar part... where the box that says "go to date." well i know there is a way to change the background and border of that but i cant think of how. i also know that by using whatever code to change it will also change my other boxes but still i cant think of what you would call it so i have never found it and been looking forever. anyone have it? i'd be really happy lol.


-/edit/- ok nvm i looked really hard and found it. not here tho.. so now im just wondering if it is in the scripts here.. i looked and didnt see it so i will put it in there if its not... so someone just tell me if its already there or not and if i shud even bother to post it up.//