Borders

<div id="first">
  Solid borders on top and bottom, dotted borders on right and left.
</div>

div {
  padding: 10px;
  margin: 10px;
}
#first {
  border-style: solid dotted;
}

<div id="first">
  Solid border on top, dotted borders on right and left, double border at the bottom.
</div>

div {
  padding: 10px;
  margin: 10px;
}
#first {
  border-style: solid dotted double;
}

<div id="first">
  Solid border on top, dotted border on right, double border at the bottom and no border on the left.
</div>

div {
  padding: 10px;
  margin: 10px;
}
#first {
  border-style: solid dotted double none;
}