判断设备（PC，安Android，iOS）

//判断是不是PC
function IsPC() {
var userAgentInfo = navigator.userAgent;
var Agents = new Array("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;
}

　　

//判断是什么移动端
function getOSType() {
if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {
return "IOS";
} else if (/(Android)/i.test(navigator.userAgent)) {
return "Android";
} else {
return "other";
};
}