判断当前设备是移动端或者PC端

 <script>
 function browserRedirect() {
     var sUserAgent = navigator.userAgent.toLowerCase();
     var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
     var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
     var bIsMidp = sUserAgent.match(/midp/i) == "midp";
     var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
     var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
     var bIsAndroid = sUserAgent.match(/android/i) == "android";
     var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
     var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
     if (!(bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) ){
         window.location.href="要跳往的PC页面";
     } else {
         window.location.href="要跳往的手机页面";
     }
 }
 browserRedirect();
 </script>