I bet it is checking that you aren't getting the man in the middle attack or ARP attacks. Or checking for phishing tools.
I know Risk did it on his network and Bank of America Denied his access because "someone" (him) was running ARP attack on his network.
Basicly, steals your username/passwords.
The site is owned by Chase tho. Nothing to worry bout.
2005 Infiniti G35 Sedan Ivory Pearl Premium
2006 Infiniti FX45 Liquid Platinum
2010 Polaris Ranger RZR S Orange Madness
Ban count: 2