fangzhen

<script language="javascript">
var se,m=0,h=0,s=0,ss=1;
function second(){

if((ss%100)==0){s+=1;ss=1;}
if(s>0 && (s%60)==0){m+=1;s=0;}
if(m>0 && (m%60)==0){h+=1;m=0;}
t=h+"时"+m+"分"+s+"秒"+ss+"毫秒";
document.getElementById("showtime").value=t;
ss+=1;

}
function startclock(){se=setInterval("second()",1);}
function pauseclock(){clearInterval(se);}
function stopclock(){clearInterval(se);ss=1;m=h=s=0;}
</script>
<input name="s" type="button" value="开始计时" onclick="startclock()">
<input name="s" type="button" value="暂停计时" onclick="pauseclock()">
<input name="s" type="button" value="停止计时" onclick="stopclock()">
<input name="showtime" style="color:#ff0000;width:200px;" id="showtime" type="text" value="0时0分0秒">