Change And Retain DIV Selected Tag In Master Page?

I have a CSS class called selected which highlights the DIV as the current step. When they're all in separate pages, I just had to move the selected word to the next DIV.

But how can I achieve the same in Master Page VB .Net? It seems to be one page for all. When the next page loads, how do I get it to highlight the next step?

<div id="Div1">
<div class="step selected" id="Div2">
<h2>
Join</h2>
<img src="./assets/images/signup_arrow.png" class="selected">
</div>
<div class="step" id="Div3">
<h2>
Choose</h2>
</div>
<div class="step" id="Div4">
<h2>
INVITE</h2>
</div>
</div>