function incWord(word)
		{
			if (((word >> 24) & 0xff) === 0xff) { //overflow
			var b1 = (word >> 16)&0xff;
			var b2 = (word >> 8)&0xff;
			var b3 = word & 0xff;

			if (b1 === 0xff) // overflow b1
			{
			b1 = 0;
			if (b2 === 0xff)
			{
				b2 = 0;
				if (b3 === 0xff)
				{
					b3 = 0;
				}
				else
				{
					++b3;
				}
			}
			else
			{
				++b2;
			}
			}
			else
			{
			++b1;
			}

			word = 0;
			word += (b1 << 16);
			word += (b2 << 8);
			word += b3;
			}
			else
			{
			word += (0x01 << 24);
			}
			return word;
		}
@preserve
Counter block mode compatible with  Dr Brian Gladman fileenc.c
derived from CryptoJS.mode.CTR
Jan Hruby jhruby.web@gmail.com