<style>
@media (min-width: 768px) {
            #mobile_copyright {
                display: none;
    }
}
@media (max-width: 767px) {
    #desktop_copyright {
        display: none;
    }
}
</style>
<div id="mobile_copyright" align="center">
&copy; ExciteAll Marketing UG (haftungsbeschränkt)<br>All Rights Reserved 2018-<script>
now = new Date
theYear=now.getYear()
if (theYear < 1900) theYear=theYear+1900
document.write(theYear)
</script>
</div>
<div id="desktop_copyright" align="center">
&copy; ExciteAll Marketing UG (haftungsbeschränkt) - All Rights Reserved 2018-<script>
now = new Date
theYear=now.getYear()
if (theYear < 1900) theYear=theYear+1900
document.write(theYear)
</script>
</div>
<div style="clear: both;"></div>