js判断PC端或移动端

方法一：

function is_Mobile() {
        var Arry = ["iPhone", "iPad", "Android", "Windows Phone", "BB10; Touch", "BB10; Touch", "PlayBook", "Nokia"];
        var ua = navigator.userAgent;
        var res = Arry .filter(function(arr) {
            return ua.indexOf(arr) > 0;
        });
        return res.length > 0;
}
//返回ture或false,true表示是移动端，false表示不是移动端

方法二：

function is_Mobile() {
    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) {
       return true
    
    } else {
        return false
    }
}
//返回ture或false,true表示是移动端，false表示不是移动端

// 判断是否是微信
    function is_WeiXin () {
        var ua = navigator.userAgent.toLowerCase();
        if (ua.match(/MicroMessenger/i) == "micromessenger") {
            return true;
        }
    }

方法三：

var browser={  
    versions:function(){   
           var u = navigator.userAgent, app = navigator.appVersion;   
           return {//移动终端浏览器版本信息   
                trident: u.indexOf('Trident') > -1, //IE内核  
                presto: u.indexOf('Presto') > -1, //opera内核  
                webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核  
                gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //火狐内核  
                mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否为移动终端  
                ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端  
                android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或者uc浏览器  
                iPhone: u.indexOf('iPhone') > -1 , //是否为iPhone或者QQHD浏览器  
                iPad: u.indexOf('iPad') > -1, //是否iPad    
                webApp: u.indexOf('Safari') == -1, //是否web应该程序，没有头部与底部  
                weixin: u.indexOf('MicroMessenger') > -1, //是否微信   
                qq: u.match(/\sQQ/i) == " qq" //是否QQ  
            };  
         }(),  
         language:(navigator.browserLanguage || navigator.language).toLowerCase()  
}   

  if(browser.versions.mobile || browser.versions.ios || browser.versions.android ||   
    browser.versions.iPhone || browser.versions.iPad){   
        //web端      
  }else if(browser.versions.weixin){
         //微信
  }else{
        //PC端
  }

//判断是否为IE
function isIE() {
     if (!!window.ActiveXObject || "ActiveXObject" in window){
             return true; 
             }else{
                 return false; 
            }
 }