Header, new home page, more css, footer

You could try this instead of the above code.

// CSS
.overviewanswer{
	visibility: visible;
	padding:10px;
	height: 100%;
}

.overviewanswer-hidden{
	visibility: hidden;
	padding:0;
	height: 0;
}

// JS code
$('#Overview').on('click', function(e) {
      $('#OverviewAnswer').toggleClass("overview-hidden"); 
      e.preventDefault();
    });

// HTML
by default you can have     
<div id="OverviewAnswer" class="overviewanswer">