function maison_hg ()
{document.getElementById("maison_hg").style.visibility='visible';}
function maison_hg_hide ()
{document.getElementById("maison_hg").style.visibility='hidden';}
function bat_hm ()
{document.getElementById("bat_hm").style.visibility='visible';}
function bat_hm_hide ()
{document.getElementById("bat_hm").style.visibility='hidden';}
function bat_hd ()
{document.getElementById("bat_hd").style.visibility='visible';}
function bat_hd_hide ()
{document.getElementById("bat_hd").style.visibility='hidden';}