function openmenu(menuid){
	var currmenu='menu_'+menuid;
	
	if(currmenu!=oldmenu){
		Effect.SlideDown(currmenu, {duration: 0.5});
		if(oldmenu!='menu_0'){Effect.SlideUp(oldmenu, {duration: 0.8});}
		oldmenu=currmenu;
	}

}