I've build a small form button but somehow I can't get the link to open in a new tab. I've tried the target blank attribute but no results. I've also tried changing onclick="window.location.href to onclick="window.open.href but nothing seems to work.. Here is the HTML:
<form>
<input style="width: 100%;
min-width: 50px;
max-width: 300px;
padding: 20px;
cursor: pointer;
box-shadow: 6px 6px 5px; #999;
-webkit-box-shadow: 6px 6px 5px #999;
-moz-box-shadow: 6px 6px 5px #999;
font-weight: bold;
background: #9b5103;
color: #000;
border-radius: 2px;
border: 1px solid #999;
font-size: 150%;" type="button" value="Kayak Tarifa" onclick="window.location.href='https://stackoverflow.com/'" />
</form>
</body>