判斷IE和Edge

//判斷是否是IE瀏覽器，包括Edge瀏覽器
function IEVersion() {
var userAgent = navigator.userAgent;
if (!!window.ActiveXObject || "ActiveXObject" in window)
return "IE";
else if (userAgent.indexOf("Edge") > -1) {
return "Edge"
}
else {
return "-1";
}

}