<table align=center>
	<tr>
		<td><div id="clock"></div></td>
	</tr>
</table>
<script language="JavaScript">
<!--
var enabled=1;    
function onclock() {            
	var today = new Date();   
	clock.innerHTML = today.toLocaleString();     // 显示本地系统格式的日期/时间
	if(enabled==1)
	setTimeout( "onclock()", 1000);              // 每1秒执行onclock()函数
}
onclock();
//-->
</script>
<p align=center><input type="radio" name="rad" value="off"  onClick="enabled =0;onclock();">关&nbsp;
<input type="radio" name="rad" value="on"  onClick="enabled =1;onclock();" checked>开</p>