html - Select different pictures in jquery/js -

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i'm trying make simple photo viewer, , want know how select src of image, in order change big image (.big-t)

this html+js code part far:

  
  
      $("#imagefound").click(function(e){                var bigthumb = $("#imagefound").attr("src");            alert(bigthumb);          });
  
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <div class="diaporama-thumbs" id="wabi3-slider">    <div class="thumb-preview">      <img id="big-thumb" class="big-t" src="big-image1.png" />    </div>    <div class="small-thumbs">      <div class="thumbs-container">        <div class="small-pre">          <a id="findimage" href="#"><img id="imagefound" src="image1.png"/></a>        </div>        <div class="small-pre">          <a id="findimage" href="#"><img   id="imagefound" src="image2.png"/></a>        </div>      </div>    </div>  </div>
  
 
 
  
  
  
$(".small-pre img").click(function(e){        var smallsrc = $(this).attr("src");    var bigsrc = "big-"+ smallsrc;      showpicture(bigsrc);        //alert(bigsrc);  });      function showpicture(src){      $(".thumb-preview img").attr("src", src)    }
  
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>      <div class="diaporama-thumbs" id="wabi3-slider">    <div class="thumb-preview">      <img id="big-thumb" class="big-t" src="big-image1.png" />    </div>    <div class="small-thumbs">      <div class="thumbs-container">        <div class="small-pre">          <a href="#"><img src="image1.png"/></a>        </div>        <div class="small-pre">          <a  href="#"><img src="image2.png"/></a>        </div>      </div>    </div>  </di>

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