Major networks across the board will sacrifice a crucial night of the November sweeps period in the name of civic duty. Election Night coverage starts at 8 p.m. on most broadcast networks and presumably continues on through the wee hours of the morning. Here’s your handy-dandy guide to Election Night viewing. ABC News: Peter Jennings anchors Vote 2004 with the help of George Stephanopoulos and Terry Moran. Former Salon.com writer Jake Tapper will have regular…