var style;
function browsercheck() {
    style = 'ie';
    var version=parseInt(navigator.appVersion.substring(0,1));
    if (navigator.appName == "Netscape" && version==4 ) {
        style = 'ne';
    } else if(navigator.userAgent.toLowerCase().indexOf("mac")!=-1 && navigator.userAgent.toLowerCase().indexOf("msie") != -1) {
        style = 'ie_mac';
    }

    document.write('<link rel=stylesheet type="text/css" href="/creative/style/style_'+style+'.css">');
}
browsercheck();