String.prototype.trim = function () {
return this.replace(/(^\s*)|(\s*$)/g, "");
};
function ajaxObj(){
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
var t=new Date().getTime();
var txt;
var xmlhttp;
var params = "t=" + t +"&username=" + username +"&password="+ password;
alert
//创建XMLHttpRequest对象
if (window.XMLHttpRequest){
xmlhttp=new XMLHttpRequest();
}else{
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function(){
if(4==xmlhttp.readyState){
if(200==xmlhttp.status){
//获取返回值
var msg =xmlhttp.responseText.trim();
if(msg == "true"){
window.open("http://www.bessystem.com","_self");
}else{
alert(msg);
}
}
}
}
//设定请求
xmlhttp.open("post","http://localhost:8080/testweb/AjaxServlet",true);
//如果需要像 HTML 表单那样 POST 数据，请使用 setRequestHeader() 来添加 HTTP 头。然后在 send() 方法中规定您希望发送的数据：
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
//发送请求
xmlhttp.send(params);
alert('send');
}