function preload(){

MM_preloadImages('common/images/g_navi_guide_on.jpg','common/images/g_navi_insti_on.jpg','common/images/g_navi_recruit_on.jpg','common/images/g_navi_inquiry_on.jpg','common/images/g_navi_member_on.jpg')
}

function addListener(elem, eventType, func, cap) {
    if(elem.addEventListener) {
        elem.addEventListener(eventType, func, cap);
    } else if(elem.attachEvent) {
        elem.attachEvent('on' + eventType, func);
    } else {
        //alert('ご利用のブラウザーはサポートされていません。');
        return false;
    }
}

addListener(window, 'load', preload, false);