凝兒
把背景的語法刪掉就好其他不用刪 然後放上下面那一段語法:)

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var musics = new Array(1);
musics[0]="http://f5.wretch.yimg.com/a748596596/19/1504719909.mp3";
var index = Math.floor(Math.random()*musics.length);
document.write("<embed src="+
"http://pic.wretch.cc/photos/serv/video/video_player/BGMusicPlayer.swf?file="+
musics[index]+"&autostart=true&repeat=true"+
"&volume=60&backcolor=0x5080C3&frontcolor=0xffffff&lightcolor=0xffffff"+
" width=18 height=20></embed>");
</script><cencer><style>
div.head{display:none;}
body,a{cursor:url(http://ashine0118.myweb.hinet.net/kuroineko.ani),crosshair;}
.main_frame{-ms-filter:"progid:DXImageTransform.Microsoft.Alpha(opacity=55)";
 filter:alpha(opacity=55);opacity:.55;}
.head_menu,.small_menu,.tell_content,.small_head,.content,.talk_content
 {background:none;background-color:#ffffff;}
.main_frame{width:50%;}
.small_menu{background:url(none) repeat-x; color:#000000;}
body { 
 background-image: url(http://i.imgur.com/irYXS.png); 
 background-repeat:no-repeat ;
 background-position :50% 0%;
 background-attachment: fixed;}

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背景語法網址也可以用 http://i.imgur.com/wY6L6.png 
看你喜歡哪種:)
PS
背景語法是↓ 把網址換掉即可
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 background-image: url(http://i.imgur.com/irYXS.png); 
 background-repeat:no-repeat ;
 background-position :50% 0%;
 background-attachment: fixed;}