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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
<SCRIPT LANGUAGE="JavaScript">
<!-- 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>
<INPUT TYPE="button" value="看登陆本页的情况" >
</FORM>
第二步：把“”加在<body>标记里
例如：<body >
