function montre(i,lieu,source){
					 document.getElementById(i).style.visibility="visible";
			}
			function cache(i){
					 document.getElementById(i).style.visibility="hidden";
			}
		
			function rollover(lieu,source) {

					chemin = 'images/menu/';
					lieu.src = chemin + source;
			}

			function rollout(lieu,source) {

					chemin = 'images/menu/';
					lieu.src = chemin + source;
			}

function popC(page,largeur,hauteur,options) {
  var top=(screen.height-hauteur)/2;
  var left=(screen.width-largeur)/2;
  window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}