Doesn't work under Chrome/Linux (older version 26.0.1410.63). The first group of digits in the card number field show up correctly, but then something goes wron

Doesn't work under Chrome/Linux (older version 26.0.1410.63). The first group of digits in the card number field show up correctly, but then something goes wrong when the script tries to insert a space for formatting. The first digit in the second block shows up correctly, but then the cursor is positioned before the first digit/second block, so that the remainder of the block gets inserted in front of the first digit, completely messing up the card number.