function set_all_checkboxes (link_class, class_name, value){ 
	 $$(link_class).each(function (l){l.toggle();})
	 $$(class_name).each(function (c){c.checked=value;})	 
}

function toggle_items_mediateca(image){
  $$('.items').each(function (i){i.hide();})
	$(image).show();
}

function mostrar_trailer(){
	$('div_trailer').style.display="block";
}

function toggle_cines_dependent_of_position(){
	if( $('banner_position').value == 'cine' ){
		$('banner_cines_input').show()
		$$('.cines_checkbox').each(function (c){c.removeAttribute('disabled');})	 
	} else {
		$('banner_cines_input').hide()
		$$('.cines_checkbox').each(function (c){c.disabled='disabled';})	 
		
	}			
}