JS前端开发判断是否是手机端并跳转操作（小结）

<script type="text/javascript">
 // borwserRedirect
 (function browserRedirect(){
  var sUserAgent = navigator.userAgent.toLowerCase();
  var bIsIpad = sUserAgent.match(/ipad/i) == 'ipad';
  var bIsIphone = 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) == 'web';
  var bIsCE = sUserAgent.match(/windows ce/i) == 'windows ce';
  var bIsWM = sUserAgent.match(/windows mobile/i) == 'windows mobile';
  var bIsAndroid = sUserAgent.match(/android/i) == 'android';
  if(bIsIpad || bIsIphone || bIsMidp || bIsUc7 || bIsUc || bIsCE || bIsWM || bIsAndroid ){
  window.location.href = '跳转的移动端网址';
  }
 })();
 </script>
<script type="text/javascript"> 
<!-- 
  //平台、设备和操作系统 
  var system = { 
   win: false, 
   mac: false, 
   xll: false, 
   ipad:false 
  }; 
  //检测平台 
  var p = navigator.platform; 
  system.win = p.indexOf("Win") == 0; 
  system.mac = p.indexOf("Mac") == 0; 
  system.x11 = (p == "X11") || (p.indexOf("Linux") == 0); 
  system.ipad = (navigator.userAgent.match(/iPad/i) != null)?true:false; 
  //跳转语句，如果是手机访问就自动跳转到wap.baidu.com页面 
  if (system.win || system.mac || system.xll||system.ipad) { 
  } else { 
   window.location.href = "http://www.jdpatro.com/3g/"; 
  } 
--> 
</script>

<script type="text/javascript">
if(window.location.toString().indexOf('pref=padindex') != -1){
}else{
 if(/AppleWebKit.*Mobile/i.test(navigator.userAgent) || (/MIDP|SymbianOS|NOKIA|SAMSUNG|LG|NEC|TCL|Alcatel|BIRD|DBTEL|Dopod|PHILIPS|HAIER|LENOVO|MOT-|Nokia|SonyEricsson|SIE-|Amoi|ZTE/.test(navigator.userAgent))){ 
  if(window.location.href.indexOf("?mobile")<0){
  try{
   if(/Android|Windows Phone|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)){
    window.location.href="http://xw.qq.com/index.htm";
   }else if(/iPad/i.test(navigator.userAgent)){
    //window.location.href="http://www.qq.com/pad/"
   }else{
    window.location.href="http://xw.qq.com/simple/s/index/"
   }
  }catch(e){}
 }
 }
}
</script>
<script type="text/javascript"> 
<!-- 
  //平台、设备和操作系统 
  var system = { 
   win: false, 
   mac: false, 
   xll: false, 
   ipad:false 
  }; 
  //检测平台 
  var p = navigator.platform; 
  system.win = p.indexOf("Win") == 0; 
  system.mac = p.indexOf("Mac") == 0; 
  system.x11 = (p == "X11") || (p.indexOf("Linux") == 0); 
  system.ipad = (navigator.userAgent.match(/iPad/i) != null)?true:false; 
  //跳转语句，如果是手机访问就自动跳转到wap.baidu.com页面 
  if (system.win || system.mac || system.xll||system.ipad) { 
  } else { 
   window.location.href = "http://www.jdpatro.com/3g/"; 
  } 
--> 
</script>

<script type="text/javascript"> 
 var bForcepc = fGetQuery("dv") == "pc"; 
 function fBrowserRedirect(){ 
  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){ 
   var sUrl = location.href;  
   if(!bForcepc){ 
    window.location.href = "http://ipad.mail.163.com/"; 
   } 
  } 
  if(bIsIphoneOs || bIsAndroid){ 
   var sUrl = location.href;  
   if(!bForcepc){ 
    window.location.href = "http://smart.mail.163.com/"; 
   } 
  } 
  if(bIsMidp||bIsUc7||bIsUc||bIsCE||bIsWM){ 
   var sUrl = location.href;  
   if(!bForcepc){ 
    window.location.href = "http://m.mail.163.com/"; 
   } 
  } 
 } 
 function fGetQuery(name){//获取参数值 
  var sUrl = window.location.search.substr(1); 
  var r = sUrl.match(new RegExp("(^|&)" + name + "=([^&]*)(&|$)")); 
  return (r == null ? null : (r[2])); 
 } 
 function fShowVerBlock(){  
  if(bForcepc){ 
   document.getElementByIdx_x("dv_block").style.display = "block"; 
  } 
  else{ 
   document.getElementByIdx_x("ad_block").style.display = "block"; 
  } 
 } 
 fBrowserRedirect(); 
 </script>