Wordpress - used with WP Polls plugin - Display a popup for people haven't vote for the current polls (you must have polls in widget)

wp-polls-popup.js

/// AUTHOR : Gaetan Renaudeau, http://gaetanrenaudeau.fr/, pro at grenlibre (DoT) fr
(function($){
  if(!jQuery) return; // we need jQuery
  
  var pollWidget = $('.widget_polls-widget')
  if(pollWidget.size() && $('input:visible', pollWidget).size()) {
    var clone = $(pollWidget).clone().removeClass('widget_polls-widget');
    $('a', clone).remove();
    $('input', clone).click(function(){
      $('.widget_polls-widget input[value='+$(this).val()+']').attr('checked', 'checked');
    });
    
    // we must update each input and label to not have id collisions
    $('input', clone).each(function(){
      var id = $(this).attr('id');
      var newId = 'popup_'+id;
      $('label[for='+id+']', clone).attr('for', newId);
      $(this).attr('id', newId);
    });
    
    $('input[type=button]', clone).addClass('closepopup');
    
    $('strong:first', clone).css('font-size', '14px');
    var blackback = $('<div id="blackback" />').css({
      opacity: 0.5,
      background: 'black',
      position: 'fixed', top: 0, left: 0,
      width: '100%', height: '100%',
      zIndex: 1
    }).appendTo('body');
    
    var popup = $('<div id="popup" />').css({
      zIndex: 2,
      position: 'fixed',
      top: '25%',
      left: '25%',
      width: '50%',
      background: 'white',
      borderRadius: '10px',
      boxShadow: '0px 2px 4px black',
      padding: '10px'
    });
    var a = $('<a class="closepopup" href="javascript:;" />').text('close').css({
      float: 'right',
      marginRight: '10px'
    });
    popup.append(a).append(clone);
    popup.appendTo('body');
    
    $(document).click(function(e){
      var target = $(e.target);
      if(target.is('.closepopup') || !target.is('#popup') && target.closest('#popup').size()==0)
      {
        blackback.remove();
        popup.remove();
      }
      
    });
  }

}(jQuery)());