js检测浏览器是PC端还是手机端

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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;
}

//true为PC端,false为手机端
var flag = IsPC();
if (!flag) {
window.location.href = "${ctx}/wap"
}