title: load() inserts the entire page instead of a fragment when using variable
body: <p>I'm trying to load a fragment of a page, more exactly <code>#index-section</code>, but if I use a variable for the page's URL, it loads the entire page.</p>
  
  <pre><code>nextPage = 2;
  nextURL = '/page/' + nextPage;
  console.log(nextURL); // returns /page/2
  $('#index-section').load(nextURL + '#index-section'); // loads entire page
  </code></pre>
  
  <p>If I use the URL directly, with no variable, it works great</p>
  
  <pre><code>$('#index-section').load('/page/2 #index-section');
  </code></pre>
  
  <p>What am I doing wrong ?</p>