carrying the janaazah

Q: At a janazah a mat (musallah) to cover the dead body while leaving home a Qur'anic verse is written on it! My question is are all the mats written the same when covering a dead body and what is written on it and why is it done?

Q: When carrying the janaazah, which direction should the body face e.g. head in front or feet in front?