function popupcentree(page,nomPage,largeur,hauteur,option){
	var top=(screen.height-hauteur)/2+25;
	var left=(screen.width-largeur)/2-10;
	thePopup=window.open(page,nomPage,"top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+option);
	if (self.focus) thePopup.focus();
}

function MM_jumpMenu(targ,selObj,restore){ //v3.0
  eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
  if (restore) selObj.selectedIndex=0;
}

function affiche(calque){
	document.getElementById(calque).style.visibility = "visible";
	document.getElementById(calque).style.display = "block";
}