我想在用户每次访问网站时在主页中打开一个弹出窗口。问题是现在每次重新加载主页时都会出现弹出窗口。我只想显示此弹出窗口一次。

<?php $currentUrl = Mage::helper('core/url')->getCurrentUrl();
 if($currentUrl=='http://website.com/')
 {
 ?>
<form action="<?php echo $this->getUrl('subscribe/index/subscriptionsave/'); ?>" id="subscribeForm" method="post">
<div id="boxes">
  <div id="dialog" class="window">
    <div id="popupfoot">  <a class="agree" href="#">close</a> </div>
    <div class="popupcontentbox">
        <div class="box_content">
            <h2>Stay in the loop!!</h2>
            <p>Be the first one to know about new arrivals,
fresh offers &  fashion updates.</p>
         <div class="book-column-left">
        <?php /*?> <label class="f">Email Address<span>*</span></label><?php */?>
         <input type="text" class="input-text required-entry validate-email" placeholder="Email Address *"  name="emailid" id="emailid">
          </div>
           <input type="submit" name="sub" value="Submit" class="btn">
           <div class="offer_text">Get flat 20% Off on your First purchase. Use coupon "INDULGE20".</div>
        </div>
    </div>

  </div>
  <div id="mask"></div>
</div>
</form>
 <?php } ?>
<script type="text/javascript">
//<![CDATA[
    var subscribeForm = new VarienForm('subscribeForm', true);
//]]>
    </script>

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.js"></script> 
    <?php */?><script>
    jQuery(document).ready(function() { 
    var id = '#dialog'; 
    //Get the screen height and width
    var maskHeight = jQuery(window).height();
    var maskWidth = jQuery(window).width();

    //Set heigth and width to mask to fill up the whole screen
    jQuery('#mask').css({'width':maskWidth,'height':maskHeight});

    //transition effect
    jQuery('#mask').fadeIn(500);    
    jQuery('#mask').fadeTo("slow",0.9); 

    //Get the window height and width
    var winH = jQuery(window).height();
    var winW = jQuery(window).width();

    //Set the popup window to center
    jQuery(id).css('top',  winH/2-jQuery(id).height()/2);
    jQuery(id).css('left', winW/2-jQuery(id).width()/2);

    //transition effect
    jQuery(id).fadeIn(2000);    

    //if close button is clicked
    jQuery('.window .agree').click(function (e) {
    //Cancel the link behavior
    e.preventDefault();

    jQuery('#mask').hide();
    jQuery('.window').hide();
    });

    //if mask is clicked
    jQuery('#mask').click(function () {
    jQuery(this).hide();
    jQuery('.window').hide();
    });

    jQuery(window).scroll(function() {    

    var scroll = jQuery(window).scrollTop();
            if(scroll > 300){
                jQuery(".gotop").addClass("active");
            }else if(scroll < 300){
                jQuery(".gotop").removeClass("active");
            }

        });

        jQuery('.gotop').click(function(){
        jQuery("html, body").animate({ scrollTop: 0 }, 700);
            return false;
         });
    });
    </script>