JS计算网页停留时间代码

代码如下:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<title>显示停留时间</title> 
</head> 
<body> 
<form name="form1" method="post" action=""> 
<center> 
<p><font size="5" color="#0000FF" face="华文细黑">您在本站已停留:</font></p> 
<p> 
<input name="textarea" type="text" value=""> 
</p> 
</center> 
<script language="javascript"> 
var second=0; 
var minute=0; 
var hour=0; 
window.setTimeout("interval();",1000); 
function interval() 
{ 
second++; 
if(second==60) 
{ 
second=0;minute+=1; 
} 
if(minute==60) 
{ 
minute=0;hour+=1; 
} 
document.form1.textarea.value = hour+"时"+minute+"分"+second+"秒"; 
window.setTimeout("interval();",1000); 
} 
</script> 
</form> 
</body> 
</html>

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