<body onload="count()">
<script>
function count(){
setInterval('t.value++',1000)
}
</script>
<input id=t>
</body>
<script>
function count(){
setInterval('t.value++',1000)
}
</script>
<input id=t>
</body>
调试欢乐多
<input type=text id=tid>
<script>
var i=0;
function addi()
{
i++;
tid.value=i;
}
</script>
</script>
<BODY onLoad="init(); window.setTimeout('show_secs()',1);">
<SCRIPT LANGUAGE="JAVASCRIPT">
<!--
var ap_name = navigator.appName;
var ap_vinfo = navigator.appVersion;
var ap_ver = parseFloat(ap_vinfo.substring(0,ap_vinfo.indexOf('(')));
var time_start = new Date();
var clock_start = time_start.getTime();
var dl_ok=false;
function init ()
{
if(ap_name=="Netscape" && ap_ver>=3.0)
dl_ok=true;
return true;
}
function get_time_spent ()
{
var time_now = new Date();
return((time_now.getTime() - clock_start)/1000);
}
function show_secs () // show the time user spent on the side
{
var i_total_secs = Math.round(get_time_spent());
var i_secs_spent = i_total_secs % 60;
var i_mins_spent = Math.round((i_total_secs-30)/60);
var s_secs_spent = "" + ((i_secs_spent>9) ? i_secs_spent : "0" + i_secs_spent);
var s_mins_spent ="" + ((i_mins_spent>9) ? i_mins_spent : "0" + i_mins_spent);
document.fm0.time_spent.value = s_mins_spent + ":" + s_secs_spent;
window.setTimeout('show_secs()',1000);
}
// -->
</SCRIPT>
<form name="fm0" onSubmit="0">您在本网页的停留时间:<br>
<INPUT type="text" name="time_spent" size=7 onFocus="this.blur()">
</form>
</body>
<input type=text id=tid>
<script>
function addi()
{tid.value=i++;}
</script>
</body>
考虑了一下，参照阿信的代码，发现没有必要clearInterval()。
最后吧代码简化成这样，和阿信的几乎是一样的了。呵呵。
<input type=text id=tid>
</body>最简单的写法了！
<body onload="showStayTime()">
<script language=JavaScript>
<!--
var strSeconds=0;
var strMinutes=0;
function showStayTime()
{
strMinutes=parseInt(strSeconds/60);
document.getElementById("spanStayTime").innerText="You Have Stayed Here For "+strMinutes+" Minutes,"+(strSeconds%60)+" Seconds";
if(strSeconds==300){alert('You Have Stayed for 5 Minutes');return;}
strSeconds++;
setTimeout("showStayTime()",1000);
}
//-->
</script>
<span id="spanStayTime"></span>
<body onload="showStayTime()">
<script language=JavaScript>
<!--
var strSeconds=0;
var strMinutes=0;
function showStayTime()
{
strMinutes=parseInt(strSeconds/60);
document.getElementById("spanStayTime").innerText="You Have Stayed Here For "+strMinutes+" Minutes,"+(strSeconds%60)+" Seconds";
if(strSeconds==300){alert('You Have Stayed for 5 Minutes');return;}
strSeconds++;
setTimeout("showStayTime()",1000);
}
//-->
</script>
<span id="spanStayTime"></span>