var SIDString = '';
 function getRandomLetter() {
   return String.fromCharCode(getRandom(65, 90));
}
function getRandom(lowerBound, upperBound) {
   return Math.floor((upperBound - lowerBound + 1) * Math.random() + lowerBound);
}
function SetSID()
{
   if (SIDString.length > 0)
   {
      return SIDString;
   }
   sidc = 0;
   while (sidc < 32)
   {
      SIDString = SIDString + getRandomLetter();
      sidc++;
   }
   return SIDString;
}