js 添加网页监听

study.ejs

// Get a reference to the link and bind the showHide function to it
        toggle = document.getElementById('toggle');
        if (toggle.addEventListener) {
            // modern browsers
            toggle.addEventListener('click', showHide, false);
        } else if (toggle.attachEvent) {
            // IE 8 and earlier
            toggle.attachEvent('onclick', showHide);
        }