If I have something like this:
<br><br><br>...Lots of BRs...<br><br><br>
<div id="thetarget"></div><div id="show"></div>
<br><br><br>...Lots of BRs...<br><br><br>
I want to show the #show
when user scroll to the #thetarget
OR/and to manipulate with css styles of the #thetarget
when user scroll to it, but without "click interaction" of the user as it normally would with <a href="#thetarget">the target</a>
Is this even possible with only css code?
If it's not, how can I make this with javascript(not jquery) so it won't be impact on performance at all(=tiny affect)?
Thank you