var ssendra = null;
function abrir_ficha(which,sx,sy){
	
	var posx=50;
	var posy=25;
		
	if (ssendra != null && !ssendra.closed) ssendra.close();
	
	ssendra = window.open(which,'fichassendra','resizable=0,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,width='+sx+',height='+sy+',screenX='+posx+',screenY='+posy+',left='+posx+',top='+posy+'');
		
	ssendra.focus();
	
}