var system ={
win : false,
mac : false,
xll : false
};
var p = navigator.platform;
system.win = p.indexOf("Win") == 0;
system.mac = p.indexOf("Mac") == 0;
system.x11 = (p == "X11") || (p.indexOf("Linux") == 0);
if(system.win||system.mac||system.xll){
}else{
window.location.href="m/help.asp?hid=1";
}