function HideIfMac(dividWin,dividLinux)
{
   if (navigator.userAgent.indexOf("Mac") != -1) {
      document.getElementById(dividWin).style.display = "none";
	  document.getElementById(dividLinux).style.display = "none";
   }
}
function HideIfWin(dividMac,dividLinux)
{
   if (navigator.userAgent.indexOf("Win") != -1) {
      document.getElementById(dividMac).style.display = "none";
	  document.getElementById(dividLinux).style.display = "none";
   }
}
function HideIfLinux(dividWin, dividMac)
{
   if (navigator.userAgent.indexOf("Linux") != -1) {
      document.getElementById(dividMac).style.display = "none";
	  document.getElementById(dividWin).style.display = "none";
   }
}