demo ekledim bi bakarmısınzı

                    <section class="product-info">
                        <div class="container">
                            <div class="row">

                                <div class="span4">
                                    <div class="product-images">
                                        <div class="box">
                                            <div class="primary">
                                                <img src="img/thumbnails/db_file_img_228_480xauto.jpg" data-zoom-image="img/thumbnails/db_file_img_228_640xauto.jpg" alt="Chaser Overalls" />
                                            </div>

                                            <div class="thumbs" id="gallery">
                                                <ul class="thumbs-list">
                                                    <li>
                                                        <a class="active" href="#" data-image="img/thumbnails/db_file_img_228_480xauto.jpg" title="Chaser Overalls" data-zoom-image="img/thumbnails/db_file_img_228_640xauto.jpg">
                                                            <img src="img/thumbnails/db_file_img_228_160xauto.jpg" alt="Chaser Overalls" />
                                                        </a>
                                                    </li>
                                                    <li>
                                                        <a href="#" data-image="img/thumbnails/db_file_img_229_480xauto.jpg" title="Chaser Overalls" data-zoom-image="img/thumbnails/db_file_img_229_640xauto.jpg">
                                                            <img src="img/thumbnails/db_file_img_229_160xauto.jpg" alt="Chaser Overalls" />
                                                        </a>
                                                    </li>
                                                    <li>
                                                        <a href="#" data-image="img/thumbnails/db_file_img_227_480xauto.jpg" title="Chaser Overalls" data-zoom-image="img/thumbnails/db_file_img_227_640xauto.jpg">
                                                            <img src="img/thumbnails/db_file_img_227_160xauto.jpg" alt="Chaser Overalls" />
                                                        </a>
                                                    </li>
                                                </ul>
                                            </div>

	$('div#gallery ul.thumbs-list li a').click(function(){
		$('div.product-images div.primary img').attr('src', $(this).data('image'));
	});