HTML

popup

            <div class="cont1" id="blur">
			<div class="cont2">
				<p>things must blur (all type of tags)</p>
				<button onclick="popup()">popup</button>
			</div>
		</div>
		<div id="popup">
			<p>Things shol=uld show in popup (all type of tage)</p>
			<button onclick="popup()">close</button>
		</div>
            

pop up

 
<a href="#" onClick='f=window.open("includes/mapage.php","fenetre","width=800, height=600, top=30, left=50") '>
 Fenêtre Pop up
 
</a>