In this tutorial with Flask, we cover how to include some of the fancier javascript aspects from Bootstrap. I happen to like the "modals" that Bootstrap offers. These are where you click on a link and, instead of loading to another page, the background dims out a bit and there is a sort of "pop up" window. This seems to fit fairly well with something like a log in button, but can also fit for a sort of "more information" button. Obviously there are many reasons why this might work, however.
Here is an example of us including the modal to work on-click with the login button:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Python Programming Tutorials</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="{{ url_for('static', filename='css/bootstrap.min.css') }}" rel="stylesheet">
<link rel="shortcut icon" href="{{ url_for('static', filename='favicon.ico') }}">
</head>
<header>
<div class="navbar-header">
<a class="navbar-brand" href="/">
<img style="max-width:120px; margin-top: -7px;" src="{{ url_for('static', filename='images/mainlogo.png') }}">
</a>
</div>
<div class = "container-fluid">
<a href="/dashboard/"><button type="button" class="btn btn-primary" aria-label="Left Align" style="margin-top: 5px; margin-bottom: 5px; height: 44px; margin-right: 15px">
<span class="glyphicon glyphicon-off" aria-hidden="true"></span> Start Learning
</button></a>
<ul class="nav navbar-nav navbar-right">
<div style="margin-right: 10px; margin-left: 15px; margin-top: 5px; margin-bottom: 5px;" class="container-fluid">
<h5>
<a href="/support-donate/"> <span class="glyphicon glyphicon-heart"></span> Support </a>
<a role="presentation" data-toggle="modal" data-target="#exampleModal" href="#"><span class="glyphicon glyphicon-log-in"></span> Login </a>
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="exampleModalLabel">Login</h4>
</div>
<div class="modal-body">
<div class="container-fluid">
<form action="" class="form-inline" method="post">
<input type="text" class="form-control" placeholder="Username" name="username" value="">
<input type="password" class="form-control" placeholder="Password" name="password" value="">
<input class="btn btn-primary" type="submit" value="Login">
</form>
<div class="container">
<br>
<p>No account? <a href='/register'>Register here</a>.</p>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
<a role="presentation" class="active" data-toggle="modal" data-target="#register" href="#"><span class="glyphicon glyphicon-pencil"></span> Sign up</a><h5>
<div class="modal fade" id="register" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="exampleModalLabel">Register</h4>
</div>
<div class="modal-body">
<div class="container">
<form method=post action="/register">
<dl>
<dt><label for="username">Username</label>
<dd><input id="username" name="username" type="text" value="">
</dd>
<dt><label for="email">Email Address</label>
<dd><input id="email" name="email" type="text" value="">
</dd>
<dt><label for="password">New Password</label>
<dd><input id="password" name="password" type="password" value="">
</dd>
<dt><label for="confirm">Repeat Password</label>
<dd><input id="confirm" name="confirm" type="password" value="">
</dd>
<dt><label for="accept_tos">I accept the <a href="/about/tos" target="blank">Terms of Service</a> and <a href="/about/privacy-policy" target="blank">Privacy Notice</a> (updated Jan 22, 2015)</label>
<dd><input id="accept_tos" name="accept_tos" type="checkbox" value="y">
</dd>
</dl>
<p><input type=submit value=Register>
</form>
</div>
</div>
</div>
</div>
</div>
</div>
</ul>
</ul>
</div>
</header>
<body>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<script type="text/javascript" src="{{ url_for('static', filename='js/bootstrap.min.js') }}"></script>
</body>
</html>
Now, when you click to log in, a modal will pop up, rather than you being sent to another page to log in.