Example

Style 1
Style 2
Style 2

CSS Code

Style 1:
.imageborder {
    border:3px solid #008000;
}
.imageborder:hover {
    border:3px solid #800000;
}

Style 2:
.twoborders {
    padding:5px;
    background:#D3CAAC; 
    border:2px solid #6A6557;
}

Style 3:
.borderradius {
	border-radius:5px;
	border:2px solid #ccc;
	padding:3px;
}