show/hide dynamic content with parameter in Wordpress - wordpress

Question

I am trying to create a second hidden page within my post which will be shown on specific parameters.
Here is the code I am using in singe.php
<!-- Default Dynamic Section -->
<div id="default-content" class="dynamic-content">
<?php the_content(); ?>
</div>
<!-- Dynamic Section 1 -->
<div id="downloadlinks" class="dynamic-content">
<?php the_title(); ?>
</div>
content of section 1 is just for an example.
this is javascript jquery code,
<script src="//code.jquery.com/jquery-1.12.0.min.js"></script>
<script type="text/javascript">
// Parse the URL parameter
function getParameterByName(name, url) {
if (!url) url = window.location.href;
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}
// Give the parameter a variable name
var dynamicContent = getParameterByName('download');
$(document).ready(function() {
// Check if the URL parameter is apples
if (dynamicContent == 'links') {
$('#downloadlinks').show();
}
// Check if the URL parmeter is empty or not defined, display default content
else {
$('#default-content').show();
}
});
</script>
I need to know, do I am going well. Is there any good way to do that?