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本文執行個體介紹了javascript動態擷取登入時間和線上時間長度的相應代碼，分享給大家供大家參考，具體內容如下
效果圖：
實現代碼：
<html> <head> <title>online</title> <script language=javaScript> ///這裡是獲得登入時候的時間，用來和動態時間做差來求時間長度 var s = new Date(); function clockon() { var thistime = new Date(); //時間差 diff = new Date(); diff.setTime(Math.abs(thistime.getTime() - s.getTime())); timediff = diff.getTime(); hos = Math.floor(timediff / (1000 * 60 * 60)); mins = Math.floor(timediff / (1000 * 60)); secs = Math.floor(timediff / 1000); //end var hours = thistime.getHours(); var minutes = thistime.getMinutes(); var seconds = thistime.getSeconds(); if (eval(hours) < 10) { hours = "0" + hours; } if (eval(minutes) < 10) { minutes = "0" + minutes; } if (seconds < 10) { seconds = "0" + seconds; } thistime = hours + ":" + minutes + ":" + seconds; bgclockshade.innerHTML = thistime//這裡動態嵌入當前的時間 //如果不取餘的話，秒數是一直上升的，所以在達到一個60的時候就取餘就可以解決這個問題了 if (secs > 59) { secs = secs % 60; } if (mins > 59) { mins = mins % 60; } if (eval(secs) < 10) { secs = "0" + secs; } if (eval(mins) < 10) { mins = "0" + mins; } if (eval(hos) < 10) { hos = "0" + hos; } jishi.innerHTML = hos + ":" + mins + ":" + secs; var timer = setTimeout("clockon()", 200); }</script> </head> <body onload="clockon();"> 登入時間： <div id="bgclockshade"></div> 上網時間長度： <div id="jishi"></div> </body></html>
以上就是本文的全部內容，希望對大家的學習有所協助。
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