.block {
  display: block;
}
.centerblock {
  display: block;
  margin: 0 auto;
}
.center {
  text-align: center;
}
.noborder {
  border: none;
}
table.one_cell_dummy_table {
  width: 100%;
  height: 100%;
}
table.one_cell_dummy_table td{
  vertical-align: middle;
  text-align: center;
}