var Win = navigator.appVersion.indexOf('Win',0) != -1;
var Mac = navigator.appVersion.indexOf('Mac',0) != -1;
if (document.layers) {
if(Mac){
document.write('');}
else
if(Win){
document.write('');}
}
else {
if(Mac){
document.write('');}
else
if(Win){
document.write('');}
}