function zfxDesplegar(obj){
	obj = $(obj);
	if (!obj.visible()){
		new Effect.BlindDown(obj,{duration: tiempoEfectos, queue: 'end'});
	}
}

function zfxContraer(obj){
	obj = $(obj);
	if (obj.visible()){
		new Effect.BlindUp(obj,{duration: tiempoEfectos, queue: 'end'});
	}
}
function zfxAlternar(obj){
	obj = $(obj);
	if (obj.visible()){
		zfxContraer(obj);
	} else {
		zfxDesplegar(obj);
	}
}
function zfxCorrer(obj){
	obj = $(obj);
	if (!obj.visible()){
		new Effect.BlindDown(obj,{duration: tiempoEfectos, queue: 'end'});
	}
}

function zfxCorrer2(obj){
	obj = $(obj);
	if (obj.visible()){
		new Effect.BlindUp(obj,{duration: tiempoEfectos, queue: 'end'});
	}
}