title: how to disable capture when upload image file (using safari on ipad)
body: <p>I would like to upload a image using safari on ipad
  here is my html code </p>
  
  <pre><code>&lt;input type="file" accept="image/*"&gt;
  </code></pre>
  
  <p>When i try to select a file, safari prompt me to choose "take photo" or "select existed file", how can i disable the "take photo" options, and just select an existing file?</p>
  
  <p>I also look up w3c document, and try codes below, but not work</p>
  
  <pre><code>&lt;input type="file" accept="image/*" capture="filesystem"&gt;
  </code></pre>