mac=(navigator.appVersion.indexOf('Mac')!=-1)?true:false;
ie=(navigator.appName.charAt(0) == "M")?true:false;

document.write("<style type='text/css'><!--")
if(mac){
//  css for mac

document.write("p {font-size:13px; letter-spacing: 1px; line-height: 15px}")
document.write(".txt {font-size:13px; letter-spacing: 1px; line-height: 15px}")
document.write(".txt2 {font-size:11px; letter-spacing: 1px; line-height: 16px}")

}
else{
if(ie){
//  css for win ie

document.write("p {font-size:14px; letter-spacing: 1px; line-height: 16px}")
document.write(".txt {font-size:14px; letter-spacing: 1px; line-height: 16px}")
document.write(".txt2 {font-size:12px; letter-spacing: 1px; line-height: 16px}")

}
else{
//  css for win nn

document.write("p {font-size:14px; letter-spacing: 1px; line-height: 16px}")
document.write(".txt {font-size:14px; letter-spacing: 1px; line-height: 16px}")
document.write(".txt2 {font-size:12px; letter-spacing: 1px; line-height: 16px}")


}
}
document.write("--></style>");