var csstype="external" //Specify type of CSS to use. "Inline" or "external"
var mac_externalcss='styles/aw_style_mac.css' //if "external", specify Mac css file here
var pc_externalcss='styles/aw_style.css'   //if "external", specify PC/default css file 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) +'">')