Merhabalar arkadaşım ben sana yardımcı olayım. aşağıdaki kodda değişiklik yaptığım yer en yukarda oradaki link'i ekleyeceğin resimin adresi yap.

En üstteki: https://lh3.googleusercontent.com/-QgYn1YKZuRU/UJUOsjujykI/AAAAAAAAG6E/Lvnn-lv_9JE/s69/arkaplan.png yazan yeri ekleyeceğin resimin adresi yap.

/* Bu Kisimda Degisim Yapilacaktir. - www.bilgisayarhocan.net */
body{background:#fff url(https://lh3.googleusercontent.com/-QgYn1YKZuRU/UJUOsjujykI/AAAAAAAAG6E/Lvnn-lv_9JE/s69/arkaplan.png);margin:0;padding:0;}
/* Bu Kisimda Degisim Yapilacaktir. - www.bilgisayarhocan.net */

#company_title{background-color:#00162C;color:#FFF;float:left;font-size:24px;line-height:60px;margin:0;padding:0;text-align:left;}
#content_container{repeat-y;border:0px solid #258;color:#666;margin:0px auto 0;padding:0;text-align:left;width:950px;}
#content_left{background-color:#FFF;float:left;margin:0;padding:15px;text-align:left;width:670px;}
#side_menu{background-color:#EFF5FF;border-left:1px solid #CFE2FF;float:right;margin:0;padding:15px;text-align:left;width:219px;}
#side_menu ul{list-style:none;margin:0 0 10px;padding:0;}
#side_menu ul li{line-height:25px;margin:0;padding:0;}
#top{background-color:#00162C;height:60px;margin:0 auto;padding:0;text-align:left;width:960px;}
#top_container{background-color:#00162c;border-bottom:3px solid #036;color:#FFF;height:60px;margin:0;padding:0;text-align:center;}
#top_menu{background:#F5F5F5 url(images/images/twittericon.png);background-repeat: no-repeat;background-position: 0;margin: 0 20px 10px 20px;padding-left: 25px;}
#twitterfeed p {text-align:center;margin:15px;}

body {font:11px/1.5 Verdana, Arial, Helvetica, sans-serif; background:#FFF}
#text {margin:50px auto; width:500px}
#tt {position:absolute; display:block; background:url(images/tt_left.gif) top left no-repeat}
#tttop {display:block; height:5px; margin-left:5px; background:url(images/tt_top.gif) top right no-repeat; overflow:hidden}
#ttcont {display:block; padding:2px 12px 3px 7px; margin-left:5px; background:#666; color:#FFF}
#ttbot {display:block; height:5px; margin-left:5px; background:url(images/tt_bottom.gif) top right no-repeat; overflow:hidden}
.hotspot {color:#900; padding-bottom:1px; border-bottom:1px dotted #900; cursor:pointer}


kolay gelsin.