function StringToHexString(str)
{
   var retval = "";

   var cbdata = str.length;
   if(cbdata > 0)
   {
      var i = 0;
      while(cbdata--)
      {
         var b = (str.charCodeAt(i) & 0xF0) >> 4;
         retval += (b <= 9) ? String.fromCharCode(b + 48) : String.fromCharCode((b - 10) + 65);
         b = str.charCodeAt(i) & 0x0F;
         retval += (b <= 9) ? String.fromCharCode(b + 48) : String.fromCharCode((b - 10) + 65);
         i++;
      }
   }

   return retval;
}