function showColorBox() {
    jQuery.fn.colorbox({onClosed:function(){ jQuery.cookie('newsletter', 'seen'); return true; },
                        width:"500px",
                        inline:true,
                         href:"#news-sign-up"});

   jQuery.get('/includes/mark-as-read.php');
}
    
    

jQuery(document).ready(function() {
  
    if(!jQuery.cookie('newsletter')) {
        window.setTimeout('showColorBox()', 30000);
    }
    
    jQuery("#newsletter_signup").submit(function() {
        jQuery.cookie('newsletter', 'seen');
        return true;
    });
    
});