JS获取当前时间

 setInterval("getTime();", 1000);
        function getTime() {
            //document.getElementById('linkweb').innerHTML = new Date().toLocaleString() + ' 星期' + '日一二三四五六'.charAt(new Date().getDay());
            //document.getElementById('dvtime').innerHTML = new Date().toLocaleDateString() + ' 星期' + '日一二三四五六'.charAt(new Date().getDay());
            var d = new Date();
            d = d.getHours() + ":" + d.getMinutes() + ":" + d.getSeconds();
            $('#dvtime').html(d);
        }

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 <div class="positionBt">
                <div class="bo_t" id="dvtime"></div>
 <div/>