📄 ch10-138.txt
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<HTML>
<HEAD>
<TITLE>警报对话框篇--有趣的警告框</TITLE>
</HEAD>
<BODY bgcolor="#fef4d2" onload=showAlert()>
<br><br>
<center>
<font color="ffaafa"><h2>警报对话框篇--有趣的警告框</h2></font>
<hr width=300>
<br><br>
<!-- 案例代码开始 -->
<script language=JavaScript >
var now = new Date()
now.setHours(now.getHours())
var min=60*now.getUTCHours()+now.getUTCMinutes()+now.getUTCSeconds()/60;
<!-- [Step1]: 这里可以更改警告框中的信息 -->
var clock = "当前的时间是： "+now.getHours()+":"+now.getMinutes()+":"+now.getSeconds()
<!-- [Step2]: 在此能够更改警告框中的信息 -->
var countvisits="您已登录本页： " + Count() + " 次 "
var expDays = 30;
var exp = new Date();
exp.setTime(exp.getTime() + (expDays*24*3600*1000));
function showAlert() {
var later = new Date()
var millilater=later.getTime()/1000
var loadTime=(Math.floor((millilater-now.getTime()/1000 )*100))/100
<!-- [Step3]: 这里可以更改警告框中的信息 -->
var loadTimeResult= "页面装载用时： "+loadTime+" 秒"
window.alert(clock+"\r"+loadTimeResult+"\r"+countvisits)
}
function Count(info){
var psj=0;
var AlertCount = GetCookie('AlertCount')
if (AlertCount == null) { AlertCount = 0; }
else{ AlertCount++; }
SetCookie ('AlertCount', AlertCount, exp);
return AlertCount;
}
function SetCookie(name, value) {
var argv = SetCookie.arguments;
var argc = SetCookie.arguments.length;
var expires = (argc > 2) ? argv[2] : null;
var path = (argc > 3) ? argv[3] : null;
var domain = (argc > 4) ? argv[4] : null;
var secure = (argc > 5) ? argv[5] : false;
document.cookie = name + "=" + escape (value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + ((path == null) ? "" : ("; path=" + path)) + ((domain == null) ? "" : ("; domain=" + domain)) + ((secure == true) ? "; secure" : "");
}
function getCookieVal(offset) {
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1) endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}
function GetCookie(name) {
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i < clen) {
var j = i + alen;
if (document.cookie.substring(i, j) == arg)
return getCookieVal (j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0) break; }
return null;
}
</script>
<!-- 案例代码结束 -->
</BODY>
</HTML>
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