if (navigator.userAgent.match(/Opera/i)){ document.write('<link rel="stylesheet" type="text/css" href="css/opera.css">')
}
else if (navigator.userAgent.match(/Gecko/i)){ document.write('<link rel="stylesheet" type="text/css" href="css/std.css">')
}
else if (navigator.userAgent.match(/Mac_PowerPC/i)){ document.write('<link rel="stylesheet" type="text/css" href="css/ie-mac.css">')
}
else if (navigator.userAgent.match(/MSIE/i)){ document.write('<link rel="stylesheet" type="text/css" href="css/ie.css">')
}
else { document.write('<link rel="stylesheet" type="text/css" href="css/std.css">')
}