Attack. That is the promise of Marty Mornhinweg, the new Jets offensive coordinator, who brings his West Coast system to a team that, presumably, will again have Mark Sanchez at the controls. “We’re gonna go after people,’’ Mornhinweg said in comments posted yesterday on the Jets’ website, his first public remarks since Rex Ryan hired him to replace the fired Tony Sparano. “There are different ways to go after people, but we’re going to go after ’em and we’re going to play to our players’ strengths rather than concerning ourselves too much about their weaknesses. If a man can’t do that, then we’ll get another player that can for that particular play.” The key to Mornhinweg’s success or failure with the Jets will be his ability to turn around Sanchez’ declining career, which took a severe nosedive during last year’s 6-10 crash landing. Mornhinweg has worked with gifted quarterbacks such as Brett Favre and Steve Young and, most recently, tried to coax more consistency out of Michael Vick with the Eagles. Up next is Sanchez. “Some of the great ones have really not thrown for such great accuracy,’’ said Mornhinweg, who according to reports met last night with Syracuse quarterback Ryan Nassib. “Steve Young was astronomical accuracy-wise. Brett Favre wasn’t. They all come in different shapes and sizes. Those guys that throw for a little bit less accuracy typically generating a little bit bigger plays on occasion. There’s a little bit of a tradeoff there.’’