body {
   background-image: url("https://secure.activecarrot.com/media/dynamic/static_images/429/MosmanSwimCentre_PIC2-72.jpg");
   background-color: #03a8c8;
}
#logo {
    background-image: url("https://secure.activecarrot.com/media/dynamic/static_images/429/Ezyswim_new logo.png");
    background-size: 100%;
    width: 300px;
    height: 155px;
    background-repeat: no-repeat;
}
ul.dropdown {
	position: relative;
	z-index: 100000;
	text-align: justify;
	font-size: 0.1px;
	width: 100%;
}

.dropdown::before {
	content: '';
	width: 100%;
	display: inline-block;
}

ul.dropdown li {
	font-weight: normal;
	float: left;
	zoom: 1;
	background: none;
	width: 20%;
	z-index: 100000;
	text-align: center;
	font-size: 14px;
	line-height: 40px;
	position: relative;
	display: inline-block;
}

 ul.dropdown ul {
	background: #f6f6f6;
	width: 187px;
	visibility: hidden;
	position: absolute;
	top: 100%;
	left: 0;
	border-right: 1px solid #ccc;
	border-bottom: 1px solid #ccc;
	border-left: 1px solid #ccc;
	border-bottom-right-radius: 0;
	box-shadow: 1px 1px 3px #999999;
	z-index: 100000;
}

<font face="arial">