document.observe("dom:loaded", function() {
    $$('a.hintText span').each(function(el) { el.hide(); });
    $$('a.hintText').each(function(el) {
        el.observe('mouseover', function() {
            el.down('span').setStyle({ display: 'block' });
        });
        el.observe('mouseout', function() {
            el.down('span').setStyle({ display: 'none' });
        });
    });
});