【求助js】为什么ie和edge无法正常运行下面代码

Question

window.onload = function(){
var selects = document.getElementsByTagName("select");
var province = selects[0];
var xmlHttp = new XMLHttpRequest();
xmlHttp.open("get", "${pageContext.request.contextPath}/provinceservlet", true);
xmlHttp.send(null);
xmlHttp.onreadystatechange = function () {
if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
var doc = xmlHttp.responseXML;
var provinces = doc.getElementsByTagName("province");
for(var xmlp of provinces) {
var newOption = document.createElement("option");
newOption.value = xmlp.getAttribute("name");
newOption.innerText = xmlp.getAttribute("name");
province.appendChild(newOption)
}
}
}

}

Answer 1

兼容性问题，把xmlhttprequest改成activexobject