手机端和PC端分别加载不同的js文件

<script type="text/javascript">  
// 根据屏幕尺寸  
if (screen && screen.width > 480) {  
document.write('<script type="text/javascript" charset="utf-8" src="pc.js"><\/script>');  
}  
  
// userAgent判断  
if( /Android|webOS|iPhone|iPod|iPad|BlackBerry/i.test(navigator.userAgent)){  
document.write('<script type="text/javascript" charset="utf-8" src="m.js"><\/script>');  
}  
</script>

<script type="text/javascript">  
function browserLoad() {  
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";  
// document.writeln("您的浏览设备为：");  
if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) {  
  
// alert("手机浏览！");  
  
document.write('<script type="text/javascript" charset="utf-8" src="m.js"><\/script>');  
} else {  
  
// alert("PC浏览！");  
document.write('<script type="text/javascript" charset="utf-8" src="pc.js"><\/script>');  
}  
}  
browserLoad();  
</script>  

function IsPC() {
    var userAgentInfo = navigator.userAgent;
    var Agents = ["Android", "iPhone",
                "SymbianOS", "Windows Phone",
                "iPad", "iPod"];
    var flag = true;
    for (var v = 0; v < Agents.length; v++) {
        if (userAgentInfo.indexOf(Agents[v]) > 0) {
            flag = false;
            break;
        }
    }
    return flag;
};
$(document).ready(function(){
    var isPC=IsPC();
    if(isPC){
        $.getScript("./pc.js",function(){  //加载pc.js,成功后，并执行回调函数
              console.log("加载js文件");
        });
    }
    else{
        $.getScript("./mobile.js",function(){  //加载mobile.js,成功后，并执行回调函数
              console.log("加载js文件");
        });
    }
});