Arka planına resim eklemek istiyorum nasıl yapabilirm.
style.css
#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/top_menu_bg.gif) repeat-x;height:30px;line-height:30px;margin:0;padding:0;text-align:left;}
#top_menu ul{list-style:none;margin:0;padding:0;}
#top_menu ul li{float:left;margin:0;padding:0;}
#top_menu ul li a,#top_menu ul li a:visited{color:#666;display:block;height:30px;line-height:30px;padding:0;text-align:center;text-decoration:none;width:100px;}
#top_menu ul li a.down,#top_menu ul li a.down:visited,#top_menu ul li a.down:hover{background-color:#FFF;border-right:1px solid #EBEBEB;color:#333;font-weight:700;width:99px;}
#top_menu ul li a:hover{background-color:#EBEBEB;color:#333;}
#welcome_box{background-color:#00162C;float:right;line-height:60px;margin:0;padding:0;text-align:right;}
#welcome_box a,#welcome_box a:visited{color:#accbff;text-decoration:none;}
#welcome_box a:hover{text-decoration:underline;}
.absmiddle{vertical-align:middle;}
.breadcrumb{background-color:#F5F5F5;margin:0 0 10px;padding:10px;}
.clear{clear:both;}
.green{color:#006F0F;}
.header{color:#1a4d80;font-size:14px;font-weight:700;}
.red{color:#BF0000;}
.small{font-size:11px;}
.warning{background-color:#FFFFDF;border:1px solid #FDFF3F;margin:0 0 10px;padding:10px;}
.contentbox{padding:10px;margin:0 0 10px;text-align:center;}
.errorbox{background-color:#FFBFBF;padding:10px;margin:0 0 10px;text-align:center;color:#7F0000;}
.successbox {border: 1px solid #66CC00;font-weight: bold;background-color: #DDFFC6;text-align: center;padding: 10px;color: #009933;}
.clientareatableactive{background-color:#DFFFE0}
.clientareatablepending{background-color:#EFEFEF}
.clientareatablesuspended{background-color:#FFF6CF}
.clientareatableterminated{background-color:#FFCFCF}
.clientticketreplyheader{background-color:#EBEBEB;color:#333;border-top:1px solid #CCC;border-right:1px solid #CCC;border-bottom:1px solid #EBEBEB;border-left:1px solid #CCC;}
.clientticketreply{background-color:#F5F5F5;margin:0 0 10px;padding:10px;border-right:1px solid #CCC;border-bottom:1px solid #CCC;border-left:1px solid #CCC;}
.adminticketreplyheader{background-color:#CFE6FF;color:#333;border-top:1px solid #CAE6FF;border-right:1px solid #CAE6FF;border-bottom:1px solid #CAE6FF;border-left:1px solid #CAE6FF}
.adminticketreply{background-color:#EEF6FF;padding:10px;margin:0 0 10px;border-right:1px solid #CAE6FF;border-bottom:1px solid #CAE6FF;border-left:1px solid #CAE6FF;}
.networkissueaffected{background-color:#EFEFEF;padding:10px;margin: 0 0 10px;}
.textgreen{color:#158F00;}
.textred{color:#9F0000;}
a,a:visited{color:#333;text-decoration:none;}
a:hover{color:#666;text-decoration:none;}
body{background-color:#F0F0F0;background-repeat:repeat-x;margin:0;padding:0;}
body,td,th{color:#666;font-family:Lucida Sans Unicode, Lucida Grande, sans-serif;font-size:12px;}
form{margin:0;padding:0;}
h1{border-bottom:1px solid #EBEBEB;color:#1a4d80;font-size:24px;font-weight:400;margin:0 0 12px;padding:0 0 3px;}
h2{border-bottom:1px solid #F5F5F5;color:#333;font-size:18px;font-weight:400;margin:0 0 5px;padding:10px 0 3px;}
h3{color:#666;font-size:16px;font-weight:700;margin:0;padding:10px 0 5px;}
hr{background-color:#EBEBEB;border:0;border-top:1px solid #EBEBEB;height:0;margin:10px 0;overflow:hidden;}
input,select,textarea{color:#666;font-family:Lucida Sans Unicode, Lucida Grande, sans-serif;font-size:12px;margin:0;padding:2px;}
p{margin:0;padding:3px 0 8px;}
table.data{margin:0 0 10px;padding:0;}
table.data td{background-color:#FFF;border-bottom:1px solid #EBEBEB;}
table.data th{background-color:#888;border-bottom:1px solid #333;color:#FFF;font-weight:400;}
table.data th a {color:#FFF;}
table.data tr.clientareatableactive td{background-color:#DFFFE0 !important;}
table.data tr.clientareatablepending td{background-color:#EFEFEF !important;}
table.data tr.clientareatablesuspended td{background-color:#FFF6CF !important;}
table.data tr.clientareatableterminated td{background-color:#FFCFCF !important;}
table.frame{margin:0 0 10px;padding:0;border:1px solid #EBEBEB;border-bottom:0;}
table.frame table td{background-color:#FFF;border-bottom:1px solid #EBEBEB;}
table.frame table td.fieldarea{background-color:#F5F5F5;color:#333;text-align:right;border-right:1px solid #EBEBEB;}
.kbarticle {padding: 2px 5px 5px 15px;}
.kbviews {color:#A8A8A8;font-size:10px;}
.kbalsoread {padding: 5px 5px 5px 15px;background-color: #F5F5F5;border-bottom: 1px solid #ccc;font-weight: bold;margin: 10px 0 10px 0;}
.searchinput {font-size: 11px;padding:0;}
#twitterfeed ul {list-style-type: none;padding: 0;margin: 15px 0 20px 0;}
#twitterfeed li {background-image: url(../../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}Ek Olarak: kimse bilmiyor mu ya