post backrounds(xanga), I need help with some backround stuff Options

[horsefreakmillie]

<style type="text/css">
table.blogbody {
border: 1px solid #FFCC00;
background-color: #000044;
width:500px;
filter:alpha(opacity=75); }
</style>

Thats the html for the backrounds i have on my posts in my xanga. My xanga- www.xanga.com/english_riding_freak

I'd like to add the same background to the stuff I have in my header. Also if possible. can I make the side colums have the same background?

Thnx a lot if u can get my the code!