title: jQuery: Passing values to array without affecting others
body: <p>I am using a tabs plugin which allows you to pass your default options for it's behavior.</p>
  
  <pre><code>$('#responsiveTabsDemo').responsiveTabs({
  startCollapsed: 'accordion',
  setHash: true
  });
  </code></pre>
  
  <p>Inside the .js file:</p>
  
  <pre><code>var defaults = {
  
          active: null,
          event: 'click',
          disabled: [],
          collapsible: 'accordion',
          startCollapsed: false,
          rotate: false,
          setHash: false,
          animation: 'default',
          animationQueue: false,
          duration: 500,
          scrollToAccordion: false,
          scrollToAccordionOnLoad: true,
          scrollToAccordionOffset: 0,
          accordionTabElement: '&lt;div&gt;&lt;/div&gt;',
          activate: function(){},
          deactivate: function(){},
          load: function(){},
          activateState: function(){},
          classes: {
              tabStyle: 'j',
              stateDefault: 'j-tabs-state-default',
              stateActive: 'j-tabs-state-active',
              stateDisabled: 'j-tabs-state-disabled',
              stateExcluded: 'j-tabs-state-excluded',
              container: 'j-tabs',
              ul: 'j-tabs-nav',
              tab: 'j-tabs-tab',
              anchor: 'j-tabs-anchor ',
              panel: 'j-tabs-panel',
              accordionTitle: 'j-tabs-accordion-title '
          }
      };
  </code></pre>
  
  <p>So, by specifying any of these on the page, I can overwrite any of the defaults. </p>
  
  <p>However, I would like to overwrite some of the default values for <code>classes</code>. I tried:</p>
  
  <pre><code>$('#responsiveTabsDemo').responsiveTabs({
  
      startCollapsed: 'accordion',
      setHash: true,
      classes: {
        tabStyle: 'r'
      }
  
  });
  </code></pre>
  
  <p>...but this removes all the other values for <code>classes</code>. </p>
  
  <p>How can I pass just one value to this array without wiping out all the others?</p>