scroll down a few pixels on page load

I’d like to have my homepage automatically scrolled down a few pixels once loaded. I tried with

<script> (function($  ){     $  (window).on("load",function(){         $  .mPageScroll2id("scrollTo","#casa");     }); })(jQuery); 

with the “scroll to page id” plugin but it’s not really doing what I’m looking for (it loads when the page is loading and not after).

thanks D.