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)) {
    //电脑端
    //加载js
    var scriptnode = document.createelement("script");
    scriptnode.setattribute("type", "text/javascript");
    scriptnode.setattribute("src", "/media/js/index.js");
    document.body.appendchild(scriptnode);
  } else {
    //手机端
    //加载js
    var scriptnode = document.createelement("script");
    scriptnode.setattribute("type", "text/javascript");
    scriptnode.setattribute("src", "/media/js/phone.js");
    document.body.appendchild(scriptnode);
  }
}

browserredirect();