网页浏览时间提示(登陆时间\\现在时间\\停留时间)

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<!--要完成此效果需要两个步骤

第一步：把如下代码加入到<body>区域中-->

<!-- Begin

var onHours = " ";

var onMinutes = " ";

var onSeconds = " ";

var offHours = 0;

var offMinutes = 0;

var offSeconds = 0;

var logSeconds = 0;

var logMinutes = 0;

var logHours = 0;

var OnTimeValue = " ";

var OffTimeValue = " ";

var PageTimeValue = " ";

function getLogonTime() {

var now = new Date();

var ampm = (now.getHours() >= 12) ? " P.M." : " A.M."

var Hours = now.getHours();

Hours = ((Hours > 12) ? Hours - 12 : Hours);

var Minutes = ((now.getMinutes() < 10) ? ":0" : ":") + now.getMinutes();

var Seconds = ((now.getSeconds() < 10) ? ":0" : ":") + now.getSeconds();

OnTimeValue =(" "

+ Hours

+ Minutes

+ Seconds

+ " "

+ ampm);

onHours = now.getHours();

onMinutes = now.getMinutes();

onSeconds = now.getSeconds();

}

function getLogoffTime() {

var now = new Date();

var ampm = (now.getHours() >= 12) ? " P.M." : " A.M."

var Hours = now.getHours();

Hours = ((Hours > 12) ? Hours - 12 : Hours);

var Minutes = ((now.getMinutes() < 10) ? ":0" : ":") + now.getMinutes();

var Seconds = ((now.getSeconds() < 10) ? ":0" : ":") + now.getSeconds();

OffTimeValue =(" "

+ Hours

+ Minutes

+ Seconds

+ " "

+ ampm);

offHours = now.getHours();

offMinutes = now.getMinutes();

offSeconds = now.getSeconds();

timer();

}

function timer() {

if (offSeconds >= onSeconds) {

logSeconds = offSeconds - onSeconds; }

else {

offMinutes -= 1;

logSeconds = (offSeconds + 60) - onSeconds;

}

if (offMinutes >= onMinutes) {

logMinutes = offMinutes - onMinutes; }

else {

offHours -= 1;

logMinutes = (offMinutes + 60) - onMinutes;

}

logHours = offHours - onHours;

logHours = ((logHours < 10) ? "0" : ":") + logHours;

logMinutes = ((logMinutes < 10) ? ":0" : ":") + logMinutes;

logSeconds = ((logSeconds < 10) ? ":0" : ":") +logSeconds;

PageTimeValue =(" "

+ logHours

+ logMinutes

+ logSeconds);

displayTimes();

}

function displayTimes() {

alert("\n登陆时间 : " +OnTimeValue+"\n\n现在时间 : "+OffTimeValue+"\n\n停留时间 : " + PageTimeValue);

}

// End -->

</SCRIPT>

<FORM>

</FORM>

<!--第二步：把“onLoad="getLogonTime()"”加在<body>标记里

例如：-->

[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]