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<head>
<script>
//
// Cookie Functions - Second Helping (21-Jan-96)
// Written by: Bill Dortch, hIdaho Design <bdortch@netw.com>
// The following functions are released to the public domain.
//
// The Second Helping version of the cookie functions dispenses with
// my encode and decode functions, in favor of JavaScript's new built-in
// escape and unescape functions, which do more complete encoding, and
// which are probably much faster.
//
// The new version also extends the SetCookie function, though in
// a backward-compatible manner, so if you used the First Helping of
// cookie functions as they were written, you will not need to change any
// code, unless you want to take advantage of the new capabilities.
//
// The following changes were made to SetCookie:
//
// 1. The expires parameter is now optional - that is, you can omit
// it instead of passing it null to expire the cookie at the end
// of the current session.
//
// 2. An optional path parameter has been added.
//
// 3. An optional domain parameter has been added.
//
// 4. An optional secure parameter has been added.
//
// For information on the significance of these parameters, and
// and on cookies in general, please refer to the official cookie
// spec, at:
//
//
//
// "Internal" function to return the decoded value of a cookie
//
function getCookieVal (offset) {
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}
//
// Function to return the value of the cookie specified by "name".
// name - String object containing the cookie name.
// returns - String object containing the cookie value, or null if
// the cookie does not exist.
//
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 to create or update a cookie.
// name - String object object containing the cookie name.
// value - String object containing the cookie value. May contain
// any valid string characters.
// [expires] - Date object containing the expiration data of the cookie. If
// omitted or null, expires the cookie at the end of the current session.
// [path] - String object indicating the path for which the cookie is valid.
// If omitted or null, uses the path of the calling document.
// [domain] - String object indicating the domain for which the cookie is
// valid. If omitted or null, uses the domain of the calling document.
// [secure] - Boolean (true/false) value indicating whether cookie transmission
// requires a secure channel (HTTPS).
//
// The first two parameters are required. The others, if supplied, must
// be passed in the order listed above. To omit an unused optional field,
// use null as a place holder. For example, to call SetCookie using name,
// value and path, you would code:
//
// SetCookie ("myCookieName", "myCookieValue", null, "/");
//
// Note that trailing omitted parameters do not require a placeholder.
//
// To set a secure cookie for path "/myPath", that expires after the
// current session, you might code:
//
// SetCookie (myCookieVar, cookieValueVar, null, "/myPath", null, true);
//
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 to delete a cookie. (Sets expiration date to current date/time)
// name - String object containing the cookie name
//
function DeleteCookie (name) {
var exp = new Date();
exp.setTime (exp.getTime() - 1); // This cookie is history
var cval = GetCookie (name);
document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}
</script>
</head>
<FORM NAME="demoForm" onSubmit="
if(demoForm.UserName.value.length != 0) {
var expdate = new Date ();
expdate.setTime(expdate.getTime() + (24 * 60 * 60 * 1000));
SetCookie('zip', demoForm.UserName.value, expdate);
alert('Your Zip Code is ' + demoForm.UserName.value + '. Please Press The Continue Button To Enter');
return false;
} else {
alert('Nothing Was Entered For Your Zip Code.');
return false;
}">
<CENTER>
Enter Your Zip Code: <INPUT TYPE="text" NAME="UserName" SIZE=12>
<INPUT TYPE="submit" VALUE="Submit Your Zip Code">
<INPUT TYPE="button" VALUE="Continue..."
onClick="
if(GetCookie('zip') == null)
alert('You Forgot To Enter Your Zip Code')
else
window.open('http://www.YourDomain.com/index.php', '_top')">
</FORM>
</CENTER>
I read the cookie with...
<SCRIPT>document.write("Your Zip Code is <b>" + GetCookie('zip') + ".");</SCRIPT>
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