How to style an element wit random css id
<p>I want to style an Id from an external form rendered (javascript) on my site. Problem is that the ID is random like this:</p>

<ol>
<li>page refresh one: div#4-register-form-container57287c94e2312 </li>
<li>page refresh two: div#4-register-form-container35469e56e2278</li>
<li>page refresh tree: div#4-register-form-container6575c98e1274 </li>
<li>page refresh four: div#4-register-form-container25242e33e6584   </li>
<li>and so on...</li>
</ol>

<p>If I try to style it without that the random number it won't works... Is it possible to style it?</p>