开发笔记:ajaxreturn的问题

var xmlhttp;
var dOneStr= loadXMLDoc(\'https://www.cnblogs.com/liudongpei/p/6021170.html\');
function loadXMLDoc(url) {
var htmldata;
xmlhttp = null;
if (window.XMLHttpRequest) { // code for IE7, Firefox, Opera, etc.
xmlhttp = new XMLHttpRequest();
} else if (window.ActiveXObject) { // code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
if (xmlhttp != null) {
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4) { // 4 = "loaded"
if (xmlhttp.status == 200) { // 200 = "OK"
htmldata = get_cnblogs_post_body(xmlhttp.responseText);
} else {
alert("Problem retrieving XML data:" + xmlhttp.statusText);
}
}
}
xmlhttp.open("GET", url, false);
xmlhttp.send(null);
} else {
alert("Your browser does not support XMLHTTP.");
}
return htmldata;
}