In a note to investors Monday, JP Morgan analyst Imran Khan wrote that online shopping during the holiday season is up 22% so far this year compared to the same period in 2009. Khan cites a Chase Paymentech survey of 50 online retailers as his source. Online shopping during the same period in 2009 was up 15% compared to 2008, so this year’s positive trend is good news for and other popular online retailers. Khan also noted that the heaviest days for online holiday shopping have historically been December 15th through the 21st.