var preload = new Image;
preload.src = '/_/images/cnt_s_button_on.jpg';

function menu_on(object)
{
	object.style.background = 'url(/_/images/cnt_s_button_on.jpg) no-repeat';
}

function menu_off(object)
{
	object.style.background = 'url(/_/images/cnt_s_button_off.jpg) no-repeat';
}