PHP: Update variable when link is clicked : <p>I would like to update a variable when a html hyperlinked text is clicked. 
Was wondering how I should approach this.</p>

<p>I have two seperate page options, a and b.</p>

<p>I would like to have "You are using A, CLICK HERE to change to B"
If they click, the global variable $option would update to == B.</p>

<p>Is this possible to do without the use of Javascript?</p>
