Подключение внешнего JS

function show() { 
	var std = document.querySelector(".pic"); 
	std.style.display="block"; 
	 
}

.port {  
box-shadow: 0px 10px 50px -5px #29668f; 
background:linear-gradient(to bottom, #6eaf81 5%, #feb960 100%); 
background-color:#6eaf81; 
border-radius:42px; 
border:3px solid #9f6eba; 
display:inline-block; 
cursor:pointer; 
color:#ffffff; 
font-family:Arial; 
font-size:20px; 
font-weight:bold; 
padding:32px 76px; 
text-decoration:none; 
text-shadow:0px 2px 5px #3d768a; 
} 
 
.port:hover { 
background:linear-gradient(to bottom, #feb960 5%, #6eaf81 100%); 
background-color:#feb960; 
 
box-shadow: 0px 15px 60px -5px #29668f; 
} 
 
.port:active { 
position:relative; 
top:1px; 
} 
 
.pic{ 
display: none; 
} 
 
input[type="text"]:focus { 
  border: 1px solid #000000; 
}

	<input type="text" name="Ur text" value="Enter your text here"> 
	<a href="#" class="port" onclick="show()">Смотреть все</a> 
	<div class="pic"> 
		<img src="img/one.jpg" width="20%" height="20%"> 
		<img src="img/two.jpg" width="20%" height="20%"> 
	</div> 
 
	<script src="/js/main.js"></script>