// prevSpreadAllWindows.jsx 
 
if (app.layoutWindows.length > 1) main(); 
 
function main() { 
	for ( var n = 0; n < app.layoutWindows.length; n++) { 
		var lw = app.layoutWindows[n]; 
		var s = lw.activeSpread; 
		try { 
			var nxt = s.parent.spreads[s.index - 1]; 
			lw.activeSpread = nxt; 
		} catch(e) {} 
	} 
} 

// nextSpreadAllWindows.jsx 
 
if (app.layoutWindows.length > 1) main(); 
 
function main() { 
	for ( var n = 0; n < app.layoutWindows.length; n++) { 
		var lw = app.layoutWindows[n]; 
		var s = lw.activeSpread; 
		try { 
			var nxt = s.parent.spreads[s.index + 1]; 
			lw.activeSpread = nxt; 
		} catch(e) {} 
	} 
}