Officejet 6500A Plus Prints from c- Drive just fine- Has problems printing from Internet

My Officejet 6500A Plus prints PDF docs and Word docs perfectly, but skips entire lines and words when printing a page from the Internet.  For examples, it loses entire lines when I try to print a confirmation page after an on-line bank transaction, (two different banks), likewise when I print a Mapquest page, it will print the map fine, but lose the line of print containing the Address of the object of the search, and everthing entered in the "Notes" box.  Only started doing this in the last couple of days...