js判断手机浏览器

<script type="text/javascript">  
        (function(W){  
            if(!/\/h5/.test(W.location.pathname) && /iphone|nokia|sony|ericsson|mot|samsung|sgh|lg|philips|panasonic|alcatel|lenovo|cldc|midp|wap|mobile|htc|sharp|sie-|ipod|blackberry|meizu|android|netfront|symbian|ucweb|windowsce|palm|operamini|operamobi|openwave|nexusone/i.test(navigator.userAgent.toLowerCase())){  
                //W.location.href = '跳转地址';

                W.location.href = 'http://' + W.location.host + W.location.pathname.replace(/\/$/,'') +'/h5'+ W.location.search + W.location.hash
                
            }  
              
        })(window)  
</script>