手机访问时自动跳到WAP

<script type="text/javascript">
try {
var urlhash = window.location.hash;
if (!urlhash.match("fromapp"))
{
if ((navigator.userAgent.match(/(iPhone|iPod|Android|ios|iPad)/i)))
{
window.location="http://www.551800.cn/wap/";
}
}
}
catch(err)
{
}
</script>