Mình dùng skin fmvi. Bâyh chức năng chọn hình nền nó hoạt động. Mặc dù ảnh nền và banner để trong Css nhưng ko thể hiện thị đc vì cái chức năng chọn nền. Ai biết chỉ mình cách bỏ với.
Demo: [You must be registered and logged in to see this link.]

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bỏ link Js này đi
+ vào css xóa đoạn này đi

Code:

/* Tùy chọn hình nền - www.FMvi.org */
#custom_background{background-image:url('http://i48.servimg.com/u/f48/16/58/89/73/backgr18.jpg') !important;box-shadow:0 0 10px rgba(0,0,0,0.8) inset;color:#FFF;position:relative;padding:15px 0 15px 15px}
#custom_background span{-moz-transition:all .2s ease-in-out 0;background:none no-repeat scroll 50% 50% #000;border-radius:7px 7px 7px 7px;box-shadow:0 1px 7px #000 inset, 0 1px 0 rgba(255,255,255,0.05), 0 0 1px rgba(255,255,255,0.35);cursor:pointer;display:block;float:left;height:90px;margin-right:15px;width:140px}
#custom_background span:hover{box-shadow:0 1px 2px #000 inset, 0 1px 0 rgba(255,255,255,0.05), 0 0 1px rgba(255,255,255,0.35)}
#bg1{background-image:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr20.jpg)!important;background-repeat:repeat-x!important}
#bg6{background-image:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr15.jpg)!important}
#bg5{background-image:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr16.jpg)!important}
#bg2{background-image:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr17.jpg)!important}
#bg3{background-image:url(http://i48.servimg.com/u/f48/16/58/89/73/guitar10.jpg)!important}
#bg4{background-image:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr18.jpg)!important}
#custom_url{clear:left;padding-top:10px;text-align:center}
#custom_input{background:none repeat scroll 0 0 rgba(0,0,0,0.5);border:0 none;border-radius:4px 4px 4px 4px;box-shadow:0 1px 3px rgba(0,0,0,0.75) inset, 0 1px 0 rgba(255,255,255,0.15);color:#FFF;font-size:20px;height:40px;margin-left:-15px;margin-right:8px;white-space:nowrap;width:780px;padding:0 10px 0 0}
#custom_submit{background:url(http://i48.servimg.com/u/f48/16/58/89/73/highli10.png) repeat-x scroll 0 0 rgba(197,206,213,0.4);border-radius:4px 4px 4px 4px;box-shadow:0 1px 3px rgba(0,0,0,0.6);color:#FFF;cursor:pointer;display:inline-block;font-size:20px;font-weight:400;line-height:40px;text-shadow:0 -1px 0 #4C5057;padding:0 10px}
.bg1{background:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr20.jpg) repeat fixed 50% 0 #000!important}
.bg2{background:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr12.jpg) no-repeat fixed 50% 0 #000!important}
.bg3{background:url(http://i48.servimg.com/u/f48/16/58/89/73/guitar10.jpg) repeat fixed 50% 0 #000!important}
.bg4{background:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr14.jpg) repeat fixed 50% 0 #000!important}
.bg5{background:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr11.jpg) no-repeat fixed 50% 0 #0E1E2D!important}
.bg6{background:url(http://i48.servimg.com/u/f48/16/58/89/73/backgr19.jpg) no-repeat fixed 50% 0 #000!important}
.bg_custom{background-attachment:fixed;background-color:#000;background-repeat:repeat}
#nav_background{background-color:#000;border:3px dotted #444!important;border-radius:15px 15px 15px 15px;cursor:pointer;float:right;padding:5px}
#nav_background:hover{background-color:#FFF}
#nav_background:active{background-color:#E71E7B}

banner vẫn ko hiện đc anh ơi