JS案例:退出页面时显示浏览当前页面的时间
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<!doctype html> <html> <head> <meta charset="utf-8"> <title>统计浏览某页面所用的时间</title> </head> <body bgcolor="#fef4d2" onload=Timetrack()> <br> <center> <font color="ffaafa"><h2>浏览某页所用时间</h2></font> <hr width=300> <br> <script type="text/javascript"> var entered = new Date() function Timetrack(){ var now = new Date() var seconds = Math.floor((now.getTime() - entered.getTime()) / 1000) var minutes = Math.floor(seconds /60) var second = seconds % 60 var minute = minutes % 60 document.time.timer.value = minutes + ":" + seconds var timeID= setTimeout("Timetrack()",1000) } </script> <table > <tr> <td WIDTH="100%"> <font FACE="ARIEL,HELVETICA" SIZE="-1"> <form name="time"> <div align="center"><center> <p>浏览本页总共用去<input type="text" name="timer" size="6" value="0:00"> 秒.</p> </center></div> </form> </font> </td> </tr> </table> </body> </html>