<script language="JavaScript">
var enabled = 0;    
function TOfunc() {       
	TO = window.setTimeout( "TOfunc()", 1000 );       
	var today = new Date();       
	document.clock.disp.value = today.toLocaleString();}
</script>
<form name="clock">
現在的時間是：<input type="text" name="disp" value="" size=21 onFocus="this.blur()">

<input type="radio" name="rad" value="OFF" checked onClick="
  if( enabled==1 ) 
    {document.clock.disp.value='';
     clearTimeout( TO ); 
     enabled = 0;}
   "> 關
<input type="radio" name="rad" value="on"  onClick="
     if( enabled == 0 ) {
        var TO = setTimeout( 'TOfunc()', 1000 );
        enabled = 1;     }" > 開
</form>