function hover(name, darken) {
	var h = '';
	if(darken) h = '_hover';
	$$("#nav_" + name + " .nav_left")[0].style.backgroundImage = 'url(' + base_url + '/layout/default/img/button_left'+h+'.png)';
	$$("#nav_" + name + " .txt")[0].style.backgroundImage = 'url(' + base_url + '/layout/default/img/button'+h+'.png)';
	$$("#nav_" + name + " .nav_right")[0].style.backgroundImage = 'url(' + base_url + '/layout/default/img/button_right'+h+'.png)';
	
	if(darken) {
		$$("#nav_" + name + " .txt")[0].style.color = 'white';
	}else
		$$("#nav_" + name + " .txt")[0].style.color = '#7b7c7c';
}