.randbg {
    background: url(../img/flightbanner-home.jpg) center center no-repeat;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    height: 325px;
    margin-bottom: 120px;
}

.randbg.bg1 {
    background-image: url(../img/flightbanner-home.jpg)
}

.randbg.bg2 {
    background-image: url(../img/flightbanner-home.jpg)
}

.randbg.bg3 {
    background-image: url(../img/flightbanner-home.jpg)
}

@media (max-width:1024px) {
    
}

@media only screen and (min-width:481px) and (max-width:992px) {
  
}

@media only screen and (min-width:257px) and (max-width:480px) {
 .randbg {
    height: 100%;
    margin-bottom: 5px;
}     
    
}