background image size css

1#example1 {
2  background: url(mountain.jpg);
3  background-repeat: no-repeat;
4  background-size: auto;
5}
6
7#example2 {
8  background: url(mountain.jpg);
9  background-repeat: no-repeat;
10  background-size: 300px 100px;
11}

1body {
2  background-position: center;
3  background-repeat: no-repeat;
4  background-size: cover;
5}

1background-size: cover;

1/* One way */
2background-size: cover;
3
4/* Other option */
5background-size: contain;
6

1#example1 {		/* Example1 has an auto background size */
2  background: url(mountain.jpg);
3  background-repeat: no-repeat;
4  background-size: auto;
5}
6
7#example2 {		/* Example2 has an fixed background size */
8  background: url(mountain.jpg);
9  background-repeat: no-repeat;
10  background-size: 300px 100px;
11}

1.class{
2	background: url("../images/icons/map.png") no-repeat center center/50px 50px fixed;
3}