Ajax基本原理
阿新 • • 發佈：2018-10-31
function
ajax
(method,
url,
data,
success)
{
var
xhr
=
null
;
if
(
window
.
XMLHttpRequest
){
xhr
=
new
XMLHttpRequest
();
}
else
{
xhr
=
new
ActiveXObject
(
"Microsoft.XMLHTTP"
if (method == "get" && data) { url += "?" + data; } xhr . open (method, url, true );
if (method == "get" ) { xhr . send ();
} } } } 首先建立
if (method == "get" && data) { url += "?" + data; } xhr . open (method, url, true );
if (method == "get" ) { xhr . send ();
} } } } 首先建立
function ajax(method, url, data, success) {
var xhr = null;
if(window.XMLHttpRequest){
xhr = new XMLHttpRequest();
}else{
xhr = new ActiveXObject("Microsoft.XMLHTTP");
}
if(method == "get" &&data) {
url += "?" + data;
}
xhr.open(method, url,true);
if(method == "get") {
xhr.send();
}else {
xhr.setRequestHeader("content-type", "application/application/x-www-form-urlencoded");
xhr.send(data);
}
xhr.onreadystatechange = function() {
if(xhr.readyState == 4) {
if(xhr.status == 200){
success && success(xhr.responseText);
}else {
}
}
}
}