Java用户注册代码

<div class="registerbox">
            <sf:form class="form-Register" name="formRegisterName" method="POST"
                modelAttribute="user">
                <!-- <ul>
                        <li><input name="" type="text" class="loginuser" value="用户名"
                            onclick="JavaScript:this.value=''" /></li>
                        <li><input name="" type="text" class="loginpwd" value="密码"
                            onclick="JavaScript:this.value=''" /></li>
                        <li><input name="" type="text" class="loginpwd" value="确认密码"
                            onclick="JavaScript:this.value=''" /></li>
                        <li><input name="" type="text" class="loginpwd" value="邮箱"
                            onclick="JavaScript:this.value=''" /></li>
                        <li><input name="" type="button" class="loginbtn" value="注册"
                            onclick="javascript:window.location='main.html'" /></li>
                    </ul> -->

                <ul>
                    <li><sf:input type="text" path="name" class="loginuser"
                            name="name" placeholder="用户名" /></li>
                    <li><sf:input type="password" path="password" class="loginpwd"
                            name="password" placeholder="密码" /></li>
                    <li><input type="password" path="confirmPassword"
                        name="confirmPassword" class="loginpwd" placeholder="确认密码" /></li>
                    <li><sf:input type="text" path="email" class="loginpwd"
                            name="email" placeholder="邮箱" /></li>
                    <li><button type="button" class="loginbtn"
                            onclick="registerInspection()">注册</button>
                </ul>

                <script language="javascript" type="text/javascript">
                    function registerInspection() {
                        var name = document.formRegisterName.name;
                        var password = document.formRegisterName.password;
                        var confirmPassword = document.formRegisterName.confirmPassword;
                        var email = document.formRegisterName.email;
                        alert(name + "\n" + password + "\n" + confirmPassword
                                + "\n" + email);
                        /* if(name.value.length==0){
                            alert("请输入用户名！");
                            name.focus();
                            return false;
                        }
                        if(password.value==""||password.value==null){
                            alert("请输入密码！");
                            password.focus();
                            return false;
                        }
                        if(confirmPassword.value==""||confirmPassword.value==null){
                            alert("请输入确认密码！");
                            confirmPassword.focus();
                            return false;
                        }
                        if(email.value==""||email.value==null){
                            alert("请输入邮箱！");
                            email.focus();
                            return false;
                        }
                        return true; */
                        if (!inspect(name) || !inspect(password)
                                || !inspect(confirmPassword) || !inspect(email)) {
                            return false;
                        }
                        document.formRegisterName.submit();
                        alert("成功！");
                        return true;
                    }
                </script>
            </sf:form>
        </div>

　　

<script>
    function inspect(variable) {
        if (variable.value == "" || variable.value == null
                || variable.value == undefined) {
            alert("填写完整注册信息！");
            variable.focus();
            return false;
        }
        else{
            return true;
        }
    }
</script>