单击更改回调函数变量

Question

我正在尝试使用NYT Article Search API更改页面变量，所以我可以转到下10个结果。我已经将页码作为变量，我只需要使用另一个函数对其进行更改，或者在单击下一页或上一页的链接时重新加载查询即可。

function articleSearch() {
  $('nav').hide();
  var pageCount = 0;
  var search = $('#search').val();

  $('#articles').submit(function(evt) {
    $('#searchHead').remove();
    evt.preventDefault();
    // var search = $('#search').val();
    var fromAlt = $('#fromAlt').val();
    var toAlt = $('#toAlt').val();
    var sort = $('#sort').val();
    var formData = $('#articles').serialize();
    formData = encodeURI(formData);
    var url = "http://api.nytimes.com/svc/search/v2/articlesearch.json";
    url += '?' + $.param({
      'api-key': "API-KEY-GOES-HERE",
      'q': '"' + search + '"',
      'begin_date': fromAlt,
      'end_date': toAlt,
      'sort': sort,
      'fl': "headline, byline, pub_date, snippet, web_url",
      'page': pageCount
    });
    $.getJSON(url, displayResults);
  }); // end article submit func
}

function displayResults(dataFromServer) {
  $('#searchHead').remove();
  $('#resultsList').remove();
  $('#articleHeader').remove();

  var results = dataFromServer.response.docs;
  var metaTag = dataFromServer.response.meta;  
  if (metaTag.hits < 10) {
    $('nav').hide();
  } else {
    $('nav').show();
  }

  $('#articles').after('<h2 id="searchHead"></h2>');
  $('nav').after('<ol id="resultsList"></ol>');
  $('nav').after('<p id="articleHeader">Viewing articles ' + ' of ' + metaTag.hits);
  var fromDate = $('#fromDate').val();
  var toDate = $('#toDate').val();
  var searchTerm = $('#search').val();
  var searchString = "You searched for " + searchTerm + " from " + fromDate + " to " + toDate;

  $('nav').append('<h2 id="searchHead">' + searchString + '</h2>');

  $.each(results, function(resultsIndex, resultsValue) {
    var headline = resultsValue.headline.main;
    var byline = resultsValue.byline.original;
    var pubDate = resultsValue.pub_date.slice(0, 10);
    var snippet = resultsValue.snippet;
    var link = resultsValue.web_url;
    var article = "<a href='" + link + "'>" + headline + "</a> " + byline + '<br>' + pubDate + "<br>" + snippet;
    var li = '<li>' + article + '</li>';
    $('#resultsList').append(li);
  }); //end each func
}