用户单击按钮时的本地存储

Question

我已经创建了一个注册表，我希望用户访问该网站时只需注册一次。

我使用的是localstorage，因此当用户单击十字时，它不会显示（因为您只能在选择十字后看到此十字）。

但是，它仍然显示表单。

$(document).ready(function(){
    //Get current time
    var currentTime = new Date().getTime();
    //Add hours function
    Date.prototype.addHours = function(h) {    
        this.setTime(this.getTime() + (h*60*60*1000)); 
        return this;   
    }
    //Get time after 24 hours
    var after24 = new Date().addHours(10).getTime();
    //Hide div click
    $('.close').click(function(){
        //Hide div
        $('.popup, .overlay').hide();
        //Set desired time till you want to hide that div
        localStorage.setItem('desiredTime', after24); 
    });
    //If desired time >= currentTime, based on that HIDE / SHOW
    if(localStorage.getItem('desiredTime') >= currentTime)
    {
        $('.popup, .overlay').show();
    }
    else
    {
        $('.popup, .overlay').hide();
    }
}); 

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="popup">
    <div class="cross"></div>
    <div class="popup-pad">
        <h2>header</h2>
        
        <form id="contact-form" method="post" action="contact.php" role="form">
            
            <div class="messages"></div>
            
            <div class="controls">
                
                <div>
                    <div class="col-33 fl form-group">
                        
                        <input id="form_name5" type="text" name="postcode" class="form-control textbox" placeholder="Postcode*" required="required" data-error="Postcode is required.">
                        <div class="help-block with-errors"></div>                                              
                    </div>                                  
                    
                    <div class="clear"></div>                                                                               
                    <input type="submit" class="btn btn-success btn-send" value="Enter Prize Draw">                       
                    
                    <!--<div class="col-100 form-group">
                    <input id="form_name7" type="text" name="postcode" class="form-control textbox" placeholder="Postcode*" required="required" data-error="Postcode is required.">
                    <div class="help-block with-errors"></div>
                </div>-->
                
            </div>
            
        </div>
        
        <p id="message"></p>
    </form>
</div>

<img src="images/bg.png"/> 
</div>

关于如何修改此内容的任何想法。因此，一旦点击了十字架，它将在24小时内不显示？

谢谢