var http_request = null;
function send_request(url,param,bpost,processFun) {//初始化、指定处理函数、发送请求的函数
	http_request = null;
	//开始初始化XMLHttpRequest对象
	if(window.XMLHttpRequest) { //Mozilla 浏览器
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {//设置MiME类别
			http_request.overrideMimeType("text/xml");
		}
	}
	else if (window.ActiveXObject) { // IE浏览器
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (http_request==null) { // 异常，创建对象实例失败
		window.alert("未能识别您的浏览器类别,不能创建XMLHttpRequest对象实例.");
		return false;
	} 
	if(processFun == undefined)
		processFun = processRequest;
	http_request.onreadystatechange = processFun;
	
	// 确定发送请求的方式和URL以及是否同步执行下段代码	
	http_request.open("POST", url, bpost);
	http_request.setRequestHeader("If-Modified-Since","0");	
    http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=utf-8"); 
	http_request.send(param);
}

function keypress(){
    var keycode=null;
    if(window.event){
       keycode=event.keyCode;
    }
    else
    {
       keycode=event.which;
    }
    if(keycode==13)
    {
       login();
    }
}

function login(){
    if(document.getElementById("email").value.trim()==""){
        alert("请填写邮箱再登录.");
        document.getElementById("email").focus();
        return;
    }
    
    if(document.getElementById("pwd").value=="")
    {
        alert("请填写密码再登录.");         
        document.getElementById("pwd").focus();           
        return;
    }
    var pwd=document.getElementById("pwd").value;
    var param = "&u=" + document.getElementById("email").value.trim().noharmcode();
    param += "&p=" + pwd;
      //var url="handler/ChkMail.ashx?flag=addUserMail&UserMail="+mail+"";
    send_request("handler/checklogin.ashx?action=Login",param,true,login_handdle);  
    
}	

function logout(){
    send_request("handler/checklogin.ashx?action=Logout",null,true,login_handdle); 
}

function login_handdle() {  
    if (http_request.readyState == 4) { // 判断对象状态
		if (http_request.status == 200) { // 信息已经成功返回，开始处理信息
            var p_str = http_request.responseText;
            if(p_str.split('$')[0]=="1")  //登录成功
            {         
                document.getElementById("user").style.display="";
                document.getElementById("signin").style.display="none";   
                document.getElementById("loginname").innerHTML=document.getElementById("email").value.trim().split('@')[0]; 
                 
                if(p_str.split('$')[1]=="")
                    document.getElementById("lastlogdate").innerHTML="首次登录请完善您的简历信息"; 
                else document.getElementById("lastlogdate").innerHTML="您上次登录的时间是 " + p_str.split('$')[1];
                
                document.getElementById("email").value="";
                document.getElementById("pwd").value=""; 
            }
            else if(p_str.split('$')[0]=="2")   //注销成功
            {          
                document.getElementById("user").style.display="none";
                document.getElementById("signin").style.display="";               
            }
            else  //登录失败
            {
                alert(p_str.split('$')[1]);
                document.getElementById("pwd").value="";
                document.getElementById("pwd").focus();
            }
    
		}

	}
}