ua = navigator.userAgent.toLowerCase();
if (ua.indexOf("chrome")!=-1) {
document.write('<link rel="stylesheet" href="http://thinkdesign.net/proofs/css/v2/js/webkit.css" type="text/css" />')
}

ua = navigator.userAgent.toLowerCase();
if (ua.indexOf("safari")!=-1) {
document.write('<link rel="stylesheet" href="http://thinkdesign.net/proofs/css/v2/js/webkit.css" type="text/css" />')
}

ua = navigator.userAgent.toLowerCase();
if (ua.indexOf("opera")!=-1) {
document.write('<link rel="stylesheet" href="http://thinkdesign.net/proofs/css/v2/js/webkit.css" type="text/css" />')
}