Font Help with Music Playlist, ...can't change font?! Options

[xCj425x]

I'm sorry for this stupid question, but I am really having trouble with the font. I am using the script by Jhaks, the music jukebox script. But I have no idea how to change the font/font size/etc. I previously tried using xquizit's "Changing Styles" script, but I didn't know where to put it, and it always remained the same. I appreciate any help I can get, and thanks for your time.

[Kenado]

it doesnt change the buttons but it changes the color the font and such of the play list put in header html

CODE

<style type="text/css">
input, select, textarea, .textfield, .button, iframe.htmleditor {
font:normal 8pt tahoma;
color: #FFFF80;
text-transform: none;
line-height: 8pt;
background-color: 000000;
</style>

you can edit the code do what colors and font and etc. to whatever you want