How to redirect in mobile devices

JavaScript code to redirect in mobile devices to other link or mobile view link

<script type="text/javascript">
<!--
if (screen.width <= 699)
{ document.location = "mobile.html"; }
//-->
</script>

For iPhone /ipod

<script language=javascript>
<!--
if ((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))) { location.replace("http://url-to-send-them/iphone.html"); } -->
</script>