function deplie_devise(id)
{
	var conteneur = document.getElementById("table_devise");
	var divs= conteneur.getElementsByTagName("div");
	
	for(var i=0 ; i< divs.length ; i++)
	{
		
		if( divs[i].id.search(/^bloc_devise/)>=0)
		{
			if( divs[i].id=='bloc_devise'+id)
			{
				 divs[i].style.display =  divs[i].style.display== "block"?"none":"block";
			}
			else
			{
				divs[i].style.display= "none";   
			}			
		}
	}
}