function check_input(){
    var userName=document.getElementById("textfieldName");
    var userPwd =document.getElementById("textfield2Password");
    var userValidateCode=document.getElementById("textfield3ValidateCode");
    
    
    if(userName.value==""){
        alert("用户名不能为空！");
        userName.focus();
        return false;
    }  
    if(userPwd.value==""){
        alert("密码不能为空！");
        userPwd.focus();
        return false;
    }
    if(userValidateCode.value==""){
        alert("验证码不能为空！");
        userValidateCode.focus();
        return false;
    }
}


function UserLoginValidate(){
    var userName=document.getElementById("textfieldName");
    var userPwd =document.getElementById("textfieldPassword");
    var userValidateCode=document.getElementById("textfieldValidateCode");
    
    
    if(userName.value==""){
        alert("用户名不能为空！");
        return false;
    }
    if(userPwd.value==""){
        alert("密码不能为空！");
        return false;
    }
    if(userValidateCode.value==""){
        alert("验证码不能为空！");
        return false;
    }
}



function TeacherUserLoginFodderValidate(){
    var userName=document.getElementById("TeacherUserLoginFodder1_textfieldName");
    var userPwd =document.getElementById("TeacherUserLoginFodder1_textfieldPassword");
    var userValidateCode=document.getElementById("TeacherUserLoginFodder1_textfieldValidateCode");
    
    
    if(userName.value==""){
        alert("用户名不能为空！");
        return false;
    }
    if(userPwd.value==""){
        alert("密码不能为空！");
        return false;
    }
    if(userValidateCode.value==""){
        alert("验证码不能为空！");
        return false;
    }
}

function TeacherUserLoginValidate(){
    var userName=document.getElementById("TeacherUserLogin1_textfieldName");
    var userPwd =document.getElementById("TeacherUserLogin1_textfieldPassword");
    var userValidateCode=document.getElementById("TeacherUserLogin1_textfieldValidateCode");
    
    
    if(userName.value==""){
        alert("用户名不能为空！");
        return false;
    }
    if(userPwd.value==""){
        alert("密码不能为空！");
        return false;
    }
    if(userValidateCode.value==""){
        alert("验证码不能为空！");
        return false;
    }
}

function StudentUserLoginCartonValidate(){
    var userName=document.getElementById("StudentUserLoginCarton1_textfieldName");
    var userPwd =document.getElementById("StudentUserLoginCarton1_textfieldPassword");
    var userValidateCode=document.getElementById("StudentUserLoginCarton1_textfieldValidateCode");
    
    
    if(userName.value==""){
        alert("用户名不能为空！");
        return false;
    }
    if(userPwd.value==""){
        alert("密码不能为空！");
        return false;
    }
    if(userValidateCode.value==""){
        alert("验证码不能为空！");
        return false;
    }
}

function StudentUserLoginValidate(){
    var userName=document.getElementById("StudentUserLogin1_textfieldName");
    var userPwd =document.getElementById("StudentUserLogin1_textfieldPassword");
    var userValidateCode=document.getElementById("StudentUserLogin1_textfieldValidateCode");
    
    
    if(userName.value==""){
        alert("用户名不能为空！");
        return false;
    }
    if(userPwd.value==""){
        alert("密码不能为空！");
        return false;
    }
    if(userValidateCode.value==""){
        alert("验证码不能为空！");
        return false;
    }
}



function TeacherUserLoginDingzhiValidate(){
    var userName=document.getElementById("TeacherUserLoginDingzhi1_textfieldName");
    var userPwd =document.getElementById("TeacherUserLoginDingzhi1_textfieldPassword");
    var userValidateCode=document.getElementById("TeacherUserLoginDingzhi1_textfieldValidateCode");
    
    
    if(userName.value==""){
        alert("用户名不能为空！");
        return false;
    }
    if(userPwd.value==""){
        alert("密码不能为空！");
        return false;
    }
    if(userValidateCode.value==""){
        alert("验证码不能为空！");
        return false;
    }
}


function ValidateSelect(){
    if(document.getElementById("checkboxPwd").checked){
        document.getElementById("checkboxPwd").checked=false;
    }
    else{
        document.getElementById("checkboxPwd").checked=true;
    }
}