title: Selenium locate custom html attribute
body: <pre><code>&lt;div&gt;
  &lt;input id="" class="form" type="text" z:validate="" z:prompt="form1.prompt('submit')" z:placeholder="" z:tie="submit" z:disabled="{form1.isEnabled('sumbitApply')}" placeholder="" maxlength="20"&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>I want to locate the element using z:tie="submit" custom attribute.</p>
  
  <p>So far I have tried below options. But that did not work.</p>
  
  <pre><code>//input[@z:tie='sumbit']
  //input[z:tie='sumbit']
  </code></pre>