arkaplan nasıl değiştirilr ?

<style type="text/css">  <!--
td.nav{background-image:url(http://img238.imageshack.us/img238/6600/butonnk2.jpg); background-repeat:no-repeat;}
td.nav:hover{background-image:url(http://img110.imageshack.us/img110/8356/kbutonyk1.jpg); background-repeat:no-repeat;}
td.nav a{text-decoration:none;}
td.nav_heading{background-image:url(http://img232.imageshack.us/img232/1442/bandqx0.jpg); height:35px; background-repeat:no-repeat;}
td.edit_navi_headbg{background-image:url(URL);background-color:#XXXXXX;}
td.edit_below_nav {visibility:hidden;}
td.nav a{color: #FFFFFF;}
td.headline{visibility:hidden;}
td.edit_header_full{background-image:url(http://img171.imageshack.us/img171/6141/rapbalkiy2.png);}
td.edit_content_bottom{height:0px;}
td.edit_content_top{background-image:url(http://img232.imageshack.us/img232/1442/bandqx0.jpg); height:35px; background-repeat:no-repeat;}
td.edit_content_bottom2{background-image:url(http://img232.imageshack.us/img232/1442/bandqx0.jpg);}
td.edit_content_bottom{background-image:url(URL);background-color:transparent;}
td.edit_content{background-image:url(URL);}
td.edit_content_bottom{height:0px;}
body{background-image:url(); background-attachment: fixed;background-color:;}
td.sidebar_heading{background-image:url(http://img232.imageshack.us/img232/1442/bandqx0.jpg); height:35px; background-repeat:no-repeat;}
td.edit_rb_footer {visibility:hidden;}
td.edit_rechts_sbg{visibility:hidden;}
td.edit_rechts_cbg{background-image:url(URL);background-color:transparent;}
td.edit_rechts_bottom{background-image:url(URL);background-color:transparent;}
td.shouty{background-image:url(http://img442.imageshack.us/img442/6453/gokseentrggeo7.jpg);background-color: ;}
td.shouty2{background-image:url(http://img442.imageshack.us/img442/6453/gokseentrggeo7.jpg);background-color: ;}
td.shouty3{background-image:url(http://img442.imageshack.us/img442/6453/gokseentrggeo7.jpg);background-color: ;}
td.shouty4{background-image:url(http://img442.imageshack.us/img442/6453/gokseentrggeo7.jpg);background-color: ;}
td.shouty5{background-image:url(http://img442.imageshack.us/img442/6453/gokseentrggeo7.jpg);background-color: ;}
--> </style><style type="text/css">
<!--
html, body {
text-align: center;
}
-->
</style>