不使用Timer控件显示时间的方法:
 <script type="text/javascript" language="javascript">
            
function updateTime()
            
{
                
var label = document.getElementById('ctl00_ContentPlaceHolder1_currentTime');
                
if (label) {
                    
var time = (new Date()).toLocaleTimeString();
                    time 
= time.match(/^(\s*\d{1,2}\s*\:\s*\d{1,2}\s*\:\s*\d{1,2}\s*[A-Za-z]{2}).*$/)[1];
                    label.innerHTML 
= time;
                }

            }
            
            updateTime();
            window.setInterval(updateTime, 
1000);
        
</script>