//CustomZoom.js 
if(app.documents.length != 0){ 
	if(app.activeWindow.constructor.name == "LayoutWindow"){ 
		app.activeWindow.zoomPercentage = 300; // custom zoom 
	} 
} 

function selectIt(theObj) { 
  // Selects object, turns to page and zooms in on it 
  app.select(theObj,SelectionOptions.replaceWith); 
  app.activeWindow.zoom = ZoomOptions.fitPage; 
  app.activeWindow.zoomPercentage = 200 
}