html - Jquery next button not working with image gallery -


the big image change next image, after have clicked on next button 'twice'. works okay previous button, not okay next button whenever reload page.

it great if can @ problem, have tried long time fix it, not. thank in advance.

<div >     <table id = "frame-table">    <tr>       <td id = "left1">          <img src="http://www.vintagevictorian.com/kuba_arrow_button_left.png" alt = "left"/>       </td>       <td id = "right1">          <img src="http://4vector.com/i/free-vector-kuba-arrow-button-set-clip-art_117492_kuba_arrow_button_set_clip_art_hight.png" alt = "right"/>       </td>   </tr>   </table>    <img class="img" src="http://www.gravatar.com/avatar/3d561d41394ff0d5d0715b2695c3dcf0?s=128&d=identicon&r=pg" alt="chania" width="204" height="236">   </div>  <div id = "wrapper">   <ul id = "portfolio">      <li><img class="img-thumbnail" src="http://www.gravatar.com/avatar/3d561d41394ff0d5d0715b2695c3dcf0?s=128&d=identicon&r=pg" alt = "img"/></li>      <li><img class="img-thumbnail" src="http://upload.wikimedia.org/wikipedia/commons/thumb/8/85/smiley.svg/2000px-smiley.svg.png" alt = "img"/></li>      <li><img class="img-thumbnail" src="https://lh3.googleusercontent.com/-je-vccj5xwk/aaaaaaaaaai/aaaaaaaaabg/afghgr0aeyw/photo.jpg" alt = "img"/></li>   </ul>    <button id="zoom" type="button" class="btn btn-info">       <span class="glyphicon glyphicon-search"> zoom </span>    </button>  </div>  $(function(){   var current_li =$("#portfolio li").first().parent();   $("#right1").click(function(){      if (current_li.is(":last-child")){          var next_li = $("#portfolio li").first();      } else{          var next_li = current_li.next();      }      var next_src = next_li.children("img").attr("src");     alert(next_src);     $(".img").attr("src", next_src);     current_li = next_li;    });     $("#left1").click(function(){      if (current_li.is(":first-child")){         var prev_li = $("#portfolio li").last();     } else{         var prev_li = current_li.prev();     }        var prev_src = prev_li.children("img").attr("src");     $(".img").attr("src", prev_src);     current_li = prev_li;    }); }); 

var current_li =$("#portfolio li").first().parent();

should be

var current_li =$("#portfolio>li").first();

tested locally , working.


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