/* NAVI_TOP */

function show(element) {
    
    if (element.className != '') {
        element.className += ' hover';
    } else {
        element.className = 'hover';
    }
}

function hide(element) {
    
    if (element.className != 'hover') {
        element.className = 'grid_2';
    } else {
        element.className = '';
    }
}