Ok with this..
$(window).scroll(function()
{
$(\'.slides_layover\').removeClass(\'showing_layover\');
$(\'#slides_effect\').show();
});
This detects the scroll stop after 1 milisecond (or change it) using a global timer:
var scrollTimer;
$(window).on("scroll",function(){
clearTimeout(scrollTimer);
//Do what you want whilst scrolling
scrollTimer=setTimeout(function(){afterScroll()},1);
})
function afterScroll(){
//I catched scroll stop.
}