我似乎无法得到一个直接的答案，不确定我做错了什么，但一个多月来一直在寻找解决方案。
我需要调用单独的样式表，在平台（而不是浏览器）上挂起。我有一个脚本，我发现它应该这样做，但它不起作用。
该网站是fish-fry.com/dev
我放在脑海中的脚本是：
<script type="text/javascript">
/***********************************************
* Different CSS depending on OS (mac/pc)- © Dynamic Drive (www.dynamicdrive.com)
* This notice must stay intact for use
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/
var csstype="external" //Specify type of CSS to use. "Inline" or "external"
var mac_externalcss='http://www.fish-fry.com/dev/wp-content/themes/FISH-FRY-MUSIC-AND-SOUND-CUSTOM-THEME/style.css' //if "external", specify Mac css file here
var pc_externalcss='http://www.fish-fry.com/dev/wp-content/themes/FISH-FRY-MUSIC-AND-SOUND-CUSTOM-THEME/style-windows.css' //if "external", specify PC/default css file here
///////No need to edit beyond here////////////
var mactest=navigator.userAgent.indexOf("Mac")!=-1
if (csstype=="inline"){
document.write('<style type="text/css">')
if (mactest)
document.write(mac_css)
else
document.write(pc_css)
document.write('</style>')
}
else if (csstype=="external")
document.write('<link rel="stylesheet" type="text/css" href="'+ (mactest? mac_externalcss : pc_externalcss) +'">')
</script>