http://wbex.ru/index.php?action=history&feed=atom&title=JavaScript_Tutorial%2FDevelopment%2FCookie
JavaScript Tutorial/Development/Cookie - История изменений
2026-04-04T10:27:57Z
История изменений этой страницы в вики
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http://wbex.ru/index.php?title=JavaScript_Tutorial/Development/Cookie&diff=8437&oldid=prev
Admin: 1 версия
2010-05-26T08:24:18Z
<p>1 версия</p>
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<td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 08:24, 26 мая 2010</td>
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Admin
http://wbex.ru/index.php?title=JavaScript_Tutorial/Development/Cookie&diff=8436&oldid=prev
в 18:52, 25 мая 2010
2010-05-25T18:52:56Z
<p></p>
<p><b>Новая страница</b></p><div>== Create a cookie and read it back==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
<HTML><br />
</HEAD><br />
<BODY><br />
<SCRIPT language="JavaScript"><br />
<!--<br />
function set_it() {<br />
var the_text="name=yourName&";<br />
var toexpire= new Date("March 15, 2008");<br />
var expdate="expires="+toexpire.toGMTString();<br />
the_text+=expdate;<br />
var newtext=escape(the_text);<br />
document.cookie=newtext;<br />
}<br />
function read_it() {<br />
if (document.cookie) {<br />
var mycookie=document.cookie;<br />
var fixed_cookie= unescape(mycookie);<br />
var thepairs= fixed_cookie.split("&");<br />
var pair1= thepairs[0];<br />
var pair2= thepairs[1];<br />
var namevalue1= pair1.split("=");<br />
alert("read");<br />
alert("Welcome, "+namevalue1+"!");<br />
} else {<br />
alert("set");<br />
set_it();<br />
}<br />
}<br />
read_it();<br />
//--><br />
</SCRIPT><br />
</BODY><br />
</HTML></source><br />
<br />
<br />
<br />
== Delete all cookies==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
<!--<br />
expireAt = new Date;<br />
expireAt.setMonth(expireAt.getMonth() - 1);<br />
if (document.cookie != "")<br />
{<br />
crumbs = document.cookie.split(";");<br />
for(i=0; i < crumbs.length; i++)<br />
{<br />
crumbName = crumbs[i].split("=")[0];<br />
document.cookie = crumbName + "=;expires=" + expireAt.toGMTString();<br />
}<br />
}<br />
// --><br />
</script><br />
</head><br />
<body><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== JavaScript and Cookies==<br />
<br />
<p>A cookie is a small bit of information stored in a text file on the user"s computer by a browser.</p><br />
<p>The cookie object is part of the Document object.</p><br />
<p>Cookies can be created, set, and modified by setting the appropriate values of the cookie property.</p><br />
<p>A cookie has four name attributes: expires, path, domain, and secure.</p><br />
<p>By default, a cookie lasts only during the current browsing session.</p><br />
<p>For a cookie to last beyond the current browsing session, the expires attribute must be set.</p><br />
<p>The value of expires attribute can be set to any valid date string.</p><br />
<p>The path attribute specifies the domain associated with the cookie.</p><br />
<p>The level of association begins at the specified path and goes down into any subfolders.</p><br />
<p>So for example, suppose http://www.wbex.ru/examples/cookie.html was setting a cookie and wanted the cookie to be shared across Web pages on the wbex.ru domain.</p><br />
<p>To do this, the cookie path attribute needs to be set to "/".</p><br />
<p>This allows the cookie to be accessed from any page on the www.wbex.ru Web server.</p><br />
<p>If the path was set to "/examples", the cookie would only be valid to pages in the examples folder and its subfolders.</p><br />
<p>If the secure attribute is specified, the cookie will be only be transmitted over a secure channel (HTTPS).</p><br />
<p>If secure is not specified, the cookie can be transmitted over any communications channel.</p><br />
4. 4. Cookie<br />
4. 4. 1. <br />
JavaScript and Cookies<br />
4. 4. 2. <br />
<A href="/Tutorial/JavaScript/0080__Development/ReadingCookies.htm">Reading Cookies</a><br />
4. 4. 3. <br />
<A href="/Tutorial/JavaScript/0080__Development/WritingCookies.htm">Writing Cookies</a><br />
4. 4. 4. <br />
<A href="/Tutorial/JavaScript/0080__Development/Createacookieandreaditback.htm">Create a cookie and read it back</a><br />
4. 4. 5. <br />
<A href="/Tutorial/JavaScript/0080__Development/MakecookieusingJavascript.htm">Make cookie using Javascript</a><br />
4. 4. 6. <br />
<A href="/Tutorial/JavaScript/0080__Development/Deleteallcookies.htm">Delete all cookies</a><br />
4. 4. 7. <br />
<A href="/Tutorial/JavaScript/0080__Development/Readcookievalue.htm">Read cookie value</a><br />
<br />
== Make cookie using Javascript==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
<html><br />
<head><br />
<title>A Simple Page</title><br />
<script language="JavaScript"><br />
<!--<br />
expireAt = new Date;<br />
expireAt.setMonth(expireAt.getMonth() + 3);<br />
username = "";<br />
function makeCookie()<br />
{<br />
username = document.form1.user1.value<br />
document.cookie = "name=" + username + ";expires=" + expireAt.toGMTString()<br />
}<br />
// --><br />
</script><br />
</head><br />
<body><br />
<form name="form1"><br />
<P>Username: <input type="text" name="user1"><br><br />
<a href="http://www.wbex.ru" onclick="makeCookie()">continue ...</a></p><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Read cookie value==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
<html><br />
<head><br />
<title></title><br />
<script language="JavaScript"><br />
<!--<br />
function fillIn()<br />
{<br />
if (document.cookie != "")<br />
{<br />
cookieCrumb = document.cookie.split("=")[1];<br />
document.form1.read1.value = cookieCrumb;<br />
}<br />
else<br />
{<br />
document.form1.read1.value = "Cookie empty!";<br />
}<br />
}<br />
// --><br />
</script><br />
</head><br />
<body onload="fillIn()"><br />
<form name="form1"><br />
<P>The username you entered was: <input type="text" name="read1"></p><br />
</form><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Reading Cookies==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
var cookieName = document.cookie;</source><br />
<br />
<br />
<br />
== Writing Cookies==<br />
<br />
<p>Cookie values can be created, modified, and set.</p><br />
<p>When you write a cookie, its attributes must be written as a name/value pair.</p><br />
<p>To set a cookie value, you first create a cookie and assign it a name.</p><br />
<p>Then you must set each individual attribute for the new cookie.</p><br />
<p>The expires attribute must have a valid date string.</p><br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
document.cookie = "name=" + form.cookie.value + "; expires=" + month;</source></div>