// JavaScript Document

// トップkeyimg更新時に画像変更
function change_mainimg(){
    var ramimage
        = new Array('common/img/top_mainimg_f01.jpg',
                    'common/img/top_mainimg_f02.jpg',
                    'common/img/top_mainimg_f03.jpg',
                    'common/img/top_mainimg_f04.jpg',
                    'common/img/top_mainimg_f06.jpg'
                    );

    var _buffer
        = '<style type="text/css">'
        + 'h1#topkey {'
        + 'background-image: url(' + ramimage[(new Date().getSeconds()) % ramimage.length] + ');'
        + '}'
        + '</style>';

    document.write(_buffer);
}

change_mainimg();