.o1 {
border-style: solid;
border-color: #ff0000;
width: 500px;
text-align: center;
margin: 0 auto 1em;
background: #ffffff;
}

.o2 {
border-style: solid dashed;
border-color: #ff0000 #0000ff;
width: 500px;
text-align: center;
margin: 0 auto 1em;
background: #ffffff;
}

.o3 {
border-style: solid dashed double;
border-color: #ff0000 #0000ff #008000;
width: 500px;
text-align: center;
margin: 0 auto 1em;
background: #ffffff;
}

.o4 {
border-style: solid dashed double dotted;
border-color: #ff0000 #0000ff #008000 #ffcc00;
width: 500px;
text-align: center;
margin: 0 auto 1em;
background: #ffffff;
}