gistfile1.txt

// Show All Layers in All Pages
var doc = context.document,
    pages = doc.pages()

for (var i = 0; i < [pages count]; i++) {
  var currentPage = [pages objectAtIndex:i]
  var all_layers = [currentPage children]
  for (var j = 0; j < [all_layers count]; j++) {
    var current_layer = [all_layers objectAtIndex:j]
    [current_layer setIsVisible:true]
  }
}