toggle divs with jquery
<div class="product-preview-wrapper">
  <div id="wrap">STUFF_one</div>
  <div id="wrap">STUFF_two</div>
  <div id="wrap">STUFF_three</div>
</div>

<div class="product-image-wrapper">
  <div class="product-img-thumb-small">OPTION_one</div>
  <div class="product-img-thumb-small">OPTION_two</div>
  <div class="product-img-thumb-small">OPTION_three</div>
</div>

$('.product-image-wrapper .product-img-thumb-small').click(function() {
  $('.product-preview-wrapper')
   .children()
   .eq($(this).index())
   .show()
   .siblings()
   .hide();
});

// To load the first one
$('.product-image-wrapper .product-img-thumb-small').eq(0).click();