if (navigator.appVersion.indexOf("Mac")!=-1){
if (navigator.appName.charAt(0) == "M"){
document.write("");
}
else if (navigator.appName.charAt(0) == "N"){
document.write("");
}
}
else if (navigator.appVersion.indexOf("Win")!=-1){
if (navigator.appName.charAt(0) == "M"){
document.write("");
}
else if (navigator.appName.charAt(0) == "N"){
document.write("");
}
}
else if(navigator.userAgent.indexOf("Gecko") != -1){
document.write("");
}