<div class="reklam reklam-1"></div>
<div class="reklam reklam-2"></div>

<style>
@media only screen and (min-width:600px) and (max-width:1920px)
{
.reklam {
position:fixed;
width:120px;
height:600px;
z-index:2;
top:20px;
}
.reklam-1 {
left:0px;
}
.reklam-2 {
right:0px;
}
}
@media only screen and (max-width:599px){
.reklam {
display:none;
}
}
</style>