function change_popup(id) {
		var popup = document.getElementById(id);
 		if(popup.style.display=="block"){
 			popup.style.display="none";
 		}else{
 			popup.style.display="block";
 		}
	}

/*
ADOLPH FUNTCTION
function change_popup(id) {
 		var popup = document.getElementById(id);
 		
 		if(popup.style.display=="none"){
 			popup.style.display="block";
 		}else{
 			popup.style.display="none";
 		}
	}*/

/*<a class="label" href="#" onclick="change_popup('popup_1');">Navigation</a>*/









/* PABLO FUNCTION

function show_popup(id) {
		var popup = document.getElementById(id);
		if (visible) popup.style.display="block";
		else popup.style.display="none";	
	}


*/
/* <a href="#" onclick="show_popup('popup_2',true);">privacy statement.</a> */

/*<a href="#" class="grey" onclick="show_popup('popup_2',false);">Close this window</a>*/