gistfile1.txt

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      <IMG src="image_name.jpg" width="275" height="200" border="1" name="refresh">
      <SCRIPT language="JavaScript" type="text/javascript">
      <!--
      var t = 50 // interval in seconds
      image = "1.png" //name of the image
      function Start() {
      tmp = new Date();
      tmp = "?"+tmp.getTime()
      document.images["refresh"].src = image+tmp
      setTimeout("Start()", t)
      }
      Start();
      // -->
      </SCRIPT>
      <!-- Code End -->