JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://www.inbar.co.il/datepicker/jquery-ui-1.10.3.custom.min.css">
<link rel="stylesheet" href="http://www.inbar.co.il/fancybox/jquery.fancybox-1.3.4.css">
<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
<script src="http://code.jquery.com/jquery-migrate-1.2.1.min.js"></script>
<script src="http://www.inbar.co.il/datepicker/jquery-ui-1.10.3.custom.min.js"></script>
<script src="http://www.inbar.co.il/javascripts/jquery.cycle.all.js"></script>
<script src="http://www.inbar.co.il//fancybox/jquery.fancybox-1.3.4_patch.js"></script>
<nav id="button-nav">
	<ul>
<li class="button-outline">
		<a href="http://!!!/new/booking.php">Book Now</a>
		<ul>
		    <div id="bookingBox">
		<div id="bookingBoxTitle">
			Booking <span class="green">Booking</span>
		</div>
		<form action="http://!!!/new/booking.php" method="get">
			<input type="text" id="dt1" size="10" name="dt1" value="Check In" onclick="$('#dt1').datepicker('show');"/>
			<div id="container"></div>
			<select id="nights" name="nights">
				<option value="0">Number of nights</option>
				<option value="1">1</option>
				<option value="2">2</option>
				<option value="3">3</option>
				<option value="4">4</option>
				<option value="5">5</option>
				<option value="6">6</option>
				<option value="7">7</option>
				<option value="8">8</option>
				<option value="9">9</option>
				<option value="10">10</option>
				<option value="11">11</option>
				<option value="12">12</option>
				<option value="13">13</option>
				<option value="14">14</option>
			</select>
			<input type="submit" id="bookingBoxSubmit" value="GO"/>
		</form>
	</div>
		</ul>
		</li>
    </ul>
</nav>

CSS

header nav#button-nav {
    margin-right: 24px;
}

header nav {
    margin-top: 50px;
}

header nav {
    float: left;
    margin-top: 26px;
}

nav ul, nav ol {
    list-style: none;
    list-style-image: none;
    position:relative;
}

menu, ol, ul {
    padding: 0 0 0 40px;
}

dl, menu, ol, ul {
    margin: 1em 0;
}

header nav#button-nav li {
    margin-right: 17px;
}

header nav li {
    float: right;
    margin-left: 32px;
    position: relative;
}

header nav li a {
    color: #ffffff;
    /* LOLOLOLOL HEBREW UPPERCASE */
    /*text-transform: uppercase;*/
    font-size: 17px;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 1px;
}

li.button-outline a {
    border-right: 1px solid #ffffff;
    border-left: 1px solid #ffffff;
   /* -webkit-transition: all 0.2s ease-in-out;
    -moz-transition: all 0.2s ease-in-out;
    -ms-transition: all 0.2s ease-in-out;
    -o-transition: all 0.2s ease-in-out;
    transition: all 0.2s ease-in-out;*/
    
    position:relative;
    top:-3px;
}

li.button-outline a {
    padding: 23px 11px;
    /*border: 1px solid #dadada;*/
    /*-webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    -ms-border-radius: 3px;
    -o-border-radius: 3px;
    border-radius: 3px;*/
    position: relative;
}

header nav li a:hover {
    border-bottom: 1px solid white;
}

li.button-outline:hover a {
    background-color: #56575C;
    border-right: 1px solid #56575C;
    border-left: 1px solid #56575C;
    color: white;
}

ul, li {
    margin: 0;
    padding: 0;
    list-style: none;
}

/*Initialize*/
ul#menu, ul#menu ul.sub-menu {
    padding:0;
    margin: 0;
    background-color:#517514;
}
ul#menu li, ul#menu ul.sub-menu li {
    list-style-type: none;
    display: inline-block;
}
/*Link Appearance*/
ul#menu li a, ul#menu li ul.sub-menu li a {
    text-decoration: none;
    color: #fff;
    /*background: #666;*/
    padding: 5px;
    display:inline-block;
}
/*Make the parent of sub-menu relative*/
ul#menu li {
   ...

JavaScript

$(function() {
		/*$(\"#galleryListUl\").cycle({
			fx: \"fade\",
			rev: 1,
			pager: \"#nav\",
			timeout: 4 * 1000
		});*/
		$("#dt1").datepicker({ dateFormat: "dd/mm/yy", showOn: "button", buttomText: "Arrival date",
	          buttonImage: "http://www.inbar.co.il/designFiles/Inbar_Ico_Calander.png", buttonImageOnly: true });
		$("a[rel=sideAlbumImage]").fancybox({
				'titleFormat': function(title, currentArray, currentIndex, currentOpts) 						
					{return '<table id="fancybox-title-float-wrap" cellpadding="0" cellspacing="0"><tbody><tr><td id="fancybox-title-float-right"></td><td id="fancybox-title-float-main">' +  (currentIndex + 1) + ' מ- ' + currentArray.length + ' '  + title + '</td><td id="fancybox-title-float-left"></td></tr></tbody></table>';}
		});
		$(".openinpopup").fancybox({
				'width'			: '85%',
				'height'		: '85%',
				'autoScale'		: false,
				'transitionIn'		: 'none',
				'transitionOut'		: 'none',
				'type'			: 'iframe'
		});
	});