if(navigator.appVersion.indexOf("Mac",0) != -1){
if(navigator.appName.charAt(0)=="N"){
if(navigator.appVersion.charAt(0)==4){
document.write(""); //Mac Netscape4
}
else if(navigator.appVersion.charAt(0)==5){
document.write(""); //Mac Netscape6
}
else {
//Mac NN3
}
}
else {
document.write(""); //Mac IE
}
}
else {
if(navigator.appName.charAt(0)=="N"){
if(navigator.appVersion.charAt(0)==4){
document.write(""); //Win Netscape4
}
else if(navigator.appVersion.charAt(0)==5){
document.write(""); //Win Netscape6
}
}
else {
document.write(""); //Win IE
}
}