title: Locating images uniquely when img ids are dynamic and src same for multiple images
body: <p>I have 3 custom dropdowns which open when clicked on "down arrow" image appended at the end, Code for the image is something like :</p>
  
  <pre><code>&lt;img id="x-auto-2017" class="x-form-trigger x-form-trigger-arrow " 
  src="data:image/gif;base64,R0lGODlhAQABAID/AMDAwAAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="&gt;
  </code></pre>
  
  <p></p>
  
  <p>Image id are dynamic and are in order of like 2017, 2018 etc. So I cannot use contains and identify them uniquely.</p>
  
  <p>I want to get them clicked one by one and select value from the dropdown. Please help how to identify them uniquely. </p>