给个例子给你,作个提示:
<HTML>
<HEAD>
<META NAME="GENERATOR" Content="Microsoft Developer Studio">
<META HTTP-EQUIV="Content-Type" content="text/html; charset=gb_2312-80">
<TITLE>SET&CLEAR INTERVAL DEMO</TITLE>
<SCRIPT TYPE="TEXT/JAVASCRIPT">
var timer="";
function startTimer()
{
timer=window.setInterval("acquireTime()",1000);
}
function clearTimer()
{
window.clearInterval(timer);
}
function acquireTime()
{
today=new Date();
with(today)
{
document.form1.timer.value=getHours()+":"+getMinutes()+":"+getSeconds();
}
}
</SCRIPT>
</HEAD>
<BODY>
<BODY onLoad=startTimer()>
<FORM name=form1>
<INPUT NAME="timer">
<INPUT TYPE=BUTTON VALUE="STOP" onClick=clearTimer()>
<INPUT TYPE=BUTTON VALUE="START" onClick=startTimer()>
</FORM></BODY>
</HTML>
<HTML>
<HEAD>
<META NAME="GENERATOR" Content="Microsoft Developer Studio">
<META HTTP-EQUIV="Content-Type" content="text/html; charset=gb_2312-80">
<TITLE>SET&CLEAR INTERVAL DEMO</TITLE>
<SCRIPT TYPE="TEXT/JAVASCRIPT">
var timer="";
function startTimer()
{
timer=window.setInterval("acquireTime()",1000);
}
function clearTimer()
{
window.clearInterval(timer);
}
function acquireTime()
{
today=new Date();
with(today)
{
document.form1.timer.value=getHours()+":"+getMinutes()+":"+getSeconds();
}
}
</SCRIPT>
</HEAD>
<BODY>
<BODY onLoad=startTimer()>
<FORM name=form1>
<INPUT NAME="timer">
<INPUT TYPE=BUTTON VALUE="STOP" onClick=clearTimer()>
<INPUT TYPE=BUTTON VALUE="START" onClick=startTimer()>
</FORM></BODY>
</HTML>
2、文本中同时保存一个上次清零的时间,在某段服务器端代码中做一个判断,如果当前时间比上次清零的时间大1天,则执行清零操作,并将该清零时间修改为当前时间。
3、...方法很多,不一而足