.portfolio_nav { display:none; }
.top_bar.fixed
{
	position: fixed;
	animation-name: slideDown;
	-webkit-animation-name: slideDown;	
	animation-duration: 0.5s;	
	-webkit-animation-duration: 0.5s;
	z-index: 999;
	visibility: visible !important;
	top: 0px;
}