function visibilite(thingId)
{
	
var targetElement;

for(i=1; i<=7; i++)
{
	if(i==thingId)
		{
		targetElement = document.getElementById(thingId) ;
		targetElement.style.display = "" ;
		}
	else
		{
		targetElement = document.getElementById(i) ;
		targetElement.style.display = "none" ;
		}
}
}