<script>
window.onload = function () {
var myname = document.getElementById("uname");
var pwd = document.getElementById("pwd");
if (window.XMLHttpRequest) {
var myajax = new XMLHttpRequest();
}
else {
var myajax = new ActiveXObject(‘Microsoft.XMLHTTP‘);
}
myajax.open("GET", "login.ashx?name=" + myname .value, true);
myajax.send(null);
myajax.onreadystatechange = function () {
if (myajax.readyState == 4) {
if (myajax.status == 200) {
document.getElementsByTagName("img")[0].src =myajax.responseText;
}
else {
alert("失败");
}
}
}
}
</script>
使用Ajax无刷新页面登录
原文地址：http://www.cnblogs.com/-zhang1995/p/7530712.html