Cookie允许网页把信息记录到访问者的电脑里，用于后来的检索。此Cookie记录来访者的姓名
查看演示页面 View Demo 查看全部代码 View Code
第一步：
在<head>区添加以下内容
<SCRIPT LANGUAGE="JavaScript">
/*****************************************************
* Share JavaScript (http://www.ShareJS.com)
* 使用此脚本程序，请保留此声明
* 获取此脚本以及更多的JavaScript程序，请访问 http://www.ShareJS.com
******************************************************/
<!-- Begin
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;
}
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 show_count() {
var expdate = new Date();
var num;
expdate.setTime(expdate.getTime() + (24 * 60 * 60 * 1000 * 31));
if(!(num = GetCookie("jtotwcount")))
num = 0;
num++;
SetCookie ("jtotwcount", num, expdate);
if (num == 1) document.write("Since this is the first time you have been here, please take a moment to look around.");
else document.write("You have been here " + num + " times.");
}
function auto_show_name() {
if(GetCookie("jtotwname") != null)
document.write("Welcome back to this week\'s tip " + GetCookie('jtotwname') + ". ");
else {
document.write("<FORM>Please enter your name: <INPUT TYPE = \"text\" NAME = \"nameinput\">" + "<BR><BR><INPUT TYPE = \"button\" VALUE = \"Save to Cookie\" onClick = \"set_name(this.form)\"></FORM>");
document.write("Please enter your first name in the input" + " box and press the \"Save to Cookie\" button, then the page will automatically reload. ");
}
}
function set_name(form) {
var expdate = new Date ();
expdate.setTime (expdate.getTime() + (24 * 60 * 60 * 1000 * 31));
var username = form.nameinput.value
if (username != "") {
if (confirm("确定要保存您的姓名吗?")) {
SetCookie ("jtotwname", username, expdate);
window.history.go(0);
}
}
else alert("Geez, at least enter something, entering nothing will cause an error.");
}
// End -->
</SCRIPT>
第二步：
在<body>区添加以下内容
<CENTER> <FORM> 请输入您的姓名: <input TYPE = "text" NAME = "nameinput"> <br><br> <input TYPE = "button" VALUE = "保存到Cookie" onClick = "set_name(this.form)"> </FORM> </CENTER>
