function ShowRegion(num,total) {
  for (var i=1; i<= total; i++) {
    layer("sub"+i).style.display="none";
    layer("op"+i).style.display="none";
    layer("def"+i).style.display="block";
  }
  layer("def"+num).style.display="none";
  layer("op"+num).style.display="block";
  layer("sub"+num).style.display="block";
}