String.prototype.trim = function()
{
   return this.replace(/(^\s+)|\s+$/g,"");
}
//-------v3_ajaxCookie(姓名,密码,验证码,状态) 0是第一次进入页面、1是提交登录方法
function v3_ajaxCookie(name,pwd,valid,s)
{
    //如果是第一次加载 就不进入判断
	//alert('欢迎进入品学网');
    if (s!="0")
    {
        if (name.trim()=="")
        {
            alert("请填写用户名");
			document.getElementById("txt_name").focus();
            return;
        }
        if (pwd.trim()=="")
        {
            alert("请填写用户密码");
			document.getElementById("txt_pwd").focus();
            return;
        }
        if (valid.trim()=="")
        {
            alert("请填写验证码");
			document.getElementById("txt_valid").focus();
            return;
        }
    }
	var postbody="name="+name+"&pwd="+pwd+"&valid="+valid+"&s="+s+"&random="+Math.random();
	var myajax=new Ajax.Request
	 (
		  "/common/v3_ajaxcookie.aspx",
		  {
			  method:'post',
			  postBody: postbody,
			  onComplete:function showResponse(response)
			  {
				  var cookie=response.responseText;
				  if (cookie=="-1")
				  { alert("请检查信息填写是否正确");}
				  else if (cookie =="-2")
				  { alert(" 验证码输入错误");}
				  else if (cookie=="-3")
				  { alert("只有老师或学生才可登录");}
				  else if (cookie=="-4")
				  { alert("出现错误，请稍候登录");}
				  else 
				  { v3_loginStart(cookie);}
			  }
		  }
	 )
    
    //返回用户是否登录 不为0代表登录成功
}

function v3_loginStart(cookie)
{
    document.getElementById('login_beta1').style.display='none';
    document.getElementById('login_stuendt1').style.display='none';
    document.getElementById('login_stuendt2').style.display='none';
    document.getElementById('login_teacher1').style.display='none';
    document.getElementById('login_teacher2').style.display='none';
    document.getElementById('login_teacher3').style.display='none';
    if (cookie=="0")
    {
        document.getElementById('login_beta1').style.display='';
    }
    else
    {
        dateArray=cookie.split("$");   
        var im = dateArray[0];
        if (im=="s0")//student is not vip
        {
            document.getElementById('login_stuendt1').style.display='';
            
            $('s0_name').innerHTML=dateArray[2]+"，你好！";
        }
        else if (im=="s1")//student vip
        {
            document.getElementById('login_stuendt2').style.display='';
            
            $('s1_name').innerHTML=dateArray[2]+"，你好！";
            $('s1_vmoney').innerHTML=dateArray[3]+"品学币";
            $('s1_PresentVMoney').innerHTML=+dateArray[4]+"品学券";
            
        }
        else if (im=="t0")//没有资格认证
        {
            document.getElementById('login_teacher1').style.display='';
            $('t1_name').innerHTML=dateArray[2]+"，您好！";
        }
        else if (im=="t1")//没有加入辅导站
        {
            document.getElementById('login_teacher2').style.display='';
            $('t2_name').innerHTML=dateArray[2]+"，您好！";
        }
        else if (im=="t2")//加入辅导站
        {
            document.getElementById('login_teacher3').style.display='';
            $('t3_name').innerHTML=dateArray[2]+"，您好！";
            document.getElementById('t3_agentname').innerHTML="<span>您是清大品学网的认证教师并加入<a href=\"http://"+dateArray[3]+".78ic.net\" class=\"fordl\" target=\"_blank\">NO."+dateArray[3]+"辅导站</a>。</span>";
        }
        else
        {   return; }
    }
}

function v3_ajaxSignOut()
{
    document.getElementById('txt_valid').value='';
    document.getElementById('txt_pwd').value='';
    document.getElementById('login_beta1').style.display='';
    document.getElementById('login_stuendt1').style.display='none';
    document.getElementById('login_stuendt2').style.display='none';login_teacher1
    document.getElementById('login_teacher1').style.display='none';
    document.getElementById('login_teacher2').style.display='none';
    document.getElementById('login_teacher3').style.display='none';
	var postbody="random="+Math.random();

	var myajax=new Ajax.Request
		 (
            "/common/ajaxSignOut.aspx",
            {
            method:'post',
            postBody: postbody,
            onComplete:function showResponse(response)
            {
                if (response.responseText=="0")
                {
                    alert('用户退出成功！');
                }
            }
            });
}