function montreScreen(id, e){
/*
  	if(!e) e = window.event;
  	
  	if(e.pageX || e.pageY){
			posx = e.pageX;
			posy = e.pageY;
		}
		else if(e.clientX || e.clientY){
			posx = e.clientX + document.body.scrollLeft	+ document.documentElement.scrollLeft;
			posy = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
			//posx = e.clientX;
			//posy = e.clientY;
		}
		else{
			posx = 400;
			posy = 200;
		}

  	cadre = document.getElementById(id);
  	
		posx += 70;
		posy -= 70;
		cadre.style.left = posx+'px';
		cadre.style.top = posy+'px';
*/
  	document.getElementById(id).style.visibility = "visible";
}
	
function cacheScreen(id){
    document.getElementById(id).style.visibility = "hidden";
}