function showConnexion(){
	document.getElementById('connexion').style.display='block';
	$("div#connexion").animate({opacity:1}, 300);
	document.getElementById('shadow').style.display='block';
	$("div#shadow").animate({opacity:0.8}, 300);
}

function hideConnexion(){
	$("div#connexion").animate({opacity:0}, 300, function(){document.getElementById('connexion').style.display='none'});
	$("div#shadow").animate({opacity:0}, 300, function(){document.getElementById('shadow').style.display='none'});
	;
}