Javascript document.location redirect to a wrong url

Question

I use this following code to redirect if site was visited on mobile devices

<script type="text/javascript">
<!--
if (screen.width <= 978) {
document.location = "mobile.mysite.com";
}
//-->
</script>

I tested it on many devices. Why does the site redirects to www.mysite.com/mobile.mysite.com instead of mobile.mysite.com only?

Answer 1

Try this thing

<script type="text/javascript">
<!--
if (screen.width <= 978) {
document.location.href = "http://mobile.mysite.com";
}
//-->
</script>