function show_popup()
{	top.document.getElementById('popupfield').style.visibility='visible'}

function hide_popup()
{	top.document.getElementById('popupfield').style.visibility='hidden'}


function show_image()
{	top.document.getElementById('galeriefield').style.visibility='visible'}

function hide_image()
{	top.document.getElementById('galeriefield').style.visibility='hidden'}