最简单的Ajax请求 示例

function createRequestObject() {
var ro;
if (window.ActiveXObject) {
ro = new ActiveXObject("Microsoft.XMLHTTP");
}else{
ro = new XMLHttpRequest();
}
return ro;
}
var http = createRequestObject();
function sendReq() {
http.open('post', 'handleAjaxReq.php?per1='+per1,false);
http.onreadystatechange = (window.ActiveXObject)?(handleResponse):(handleResponse());
http.send(null);
http.onreadystatechange = (window.ActiveXObject)?(handleResponse):(handleResponse());
}
function handleResponse() {
if(http.readyState == 4){
var result = http.responseText;
}
}