/****************************************************************************************
Script to read and write cookies from JavaScript
Written by Mark Wilton-Jones, 31/12/2001
*****************************************************************************************
Please see http://www.howtocreate.co.uk/jslibs/ for details and a demo of this script
Please see http://www.howtocreate.co.uk/jslibs/termsOfUse.html for terms of use
This script allows you to store and retrieve cookies easily using JavaScript. Cookies
are variables that can be stored on a user's computer and be picked up by any other web
pages in the correct domain. Cookies are set to expire after a certain length of time.
Be warned that many users will not permit cookies on their computers. Do not make your
web sites rely on them. This script provides a return value that says if they accepted
or rejected a cookie.
To use:
_________________________________________________________________________
Inbetween the tags, put:
To store a cookie, use:
var cookieAccepted = setCookie( cookieName, cookieValue[, lifeTime[, path[, domain[, isSecure]]]] )
cookieName is the name of the cookie (as a string) and can contain any characters.
cookieValue is the value that the cookie stores (as a string) and can contain any characters.
lifeTime is the amount of time in seconds that you want the cookie to last for (after which
the user's computer will delete it). The default is until the browser is closed.
path gives the path or directories that the cookie should be accessible from. The default is
the current path. Alter this using ../ (up one directory) / starting at the base directory
and subdirectoryName/ to start from the currentDirectory/subdirectoryName/
domain gives the domain that the cookie is accessible from. This must have at least one . in it
and in many browsers it must have at least two. The default is the current domain.
isSecure can be true or false and says whether or not the cookie is only accessible on sites
with a secure (https) connection.
If the user rejected the cookie, cookieAccepted will be false. In Opera, if cookies are on prompt,
the failure responce is received immediately, even if the user then accepts the cookie.
To retrieve a cookie, use:
var myCookie = retrieveCookie( cookieNameAsAString );
To modify a cookie, simply set it again with the new settings;
To delete a cookie, use:
var cookieDeletePermitted = setCookie( cookieNameAsAString, '', 'delete' );
or set lifeTime to a less than 0 value.
If the user rejected the attempt to delete the cookie, cookieDeletePermitted will be false.
_______________________________________________________________________________________*/
function retrieveCookie( cookieName ) {
/* retrieved in the format
cookieName4=value; cookieName3=value; cookieName2=value; cookieName1=value
only cookies for this domain and path will be retrieved */
var cookieJar = document.cookie.split( "; " );
for( var x = 0; x < cookieJar.length; x++ ) {
var oneCookie = cookieJar[x].split( "=" );
if( oneCookie[0] == escape( cookieName ) ) { return unescape( oneCookie[1] ); }
}
return null;
}
function setCookie( cookieName, cookieValue, lifeTime, path, domain, isSecure ) {
if( !cookieName ) { return false; }
lifeTime = 1; //lifetime in days
lifeTime = lifeTime * 24 * 3600 * 1000;
if( lifeTime == "delete" ) { lifeTime = -10; } //this is in the past. Expires immediately.
/* This next line sets the cookie but does not overwrite other cookies.
syntax: cookieName=cookieValue[;expires=dataAsString[;path=pathAsString[;domain=domainAsString[;secure]]]]
Because of the way that document.cookie behaves, writing this here is equivalent to writing
document.cookie = whatIAmWritingNow + "; " + document.cookie; */
document.cookie = escape( cookieName ) + "=" + escape( cookieValue ) +
( lifeTime ? ";expires=" + ( new Date( ( new Date() ).getTime() + ( 1000 * lifeTime ) ) ).toGMTString() : "" ) +
( path ? ";path=" + path : "") + ( domain ? ";domain=" + domain : "") +
( isSecure ? ";secure" : "");
//check if the cookie has been set/deleted as required
if( lifeTime < 0 ) { if( typeof( retrieveCookie( cookieName ) ) == "string" ) { return false; } return true; }
if( typeof( retrieveCookie( cookieName ) ) == "string" ) { return true; } return false;
}
/***********************************************************************************/
//Jeremy Tarpley's code:
//global vars
var globalCookieName = 'more_less_state';
var moreButton = '[more]';
var lessButton = '[less]';
//publicationCount() reads the value stored in , this is the total # of publications
function publicationCount() {
var totalPublications;
totalPublications = document.getElementById('pub_count').innerHTML;
/*if (document.getElementById('pub_count')!=null) {
totalPublications = document.getElementById('pub_count').innerHTML;
}
else { }
*/
return(totalPublications);
}
//arrayToString(pubArray) converts an array to a string (you cant write an array to a cookie value)
function arrayToString(pubArray) {
var element;
var newString;
element = pubArray;
newString = element.join("^");
return(newString);
}
//stringToArray(cookieContents) converts a string to an array
function stringToArray(cookieContents) {
var pubArray = cookieContents.split('^');
return(pubArray);
}
//onclick we want to change visibility, change more/less text and write change to cookie
//pub_ids start at 0
function modifyCookie(pub_id) {
//read value stored in cookie
//var cookieValue = getState();
var cookieValue = retrieveCookie(globalCookieName);
//convert cookieValue back to an array
var pubArray = stringToArray(cookieValue);
var pubState = pubArray[pub_id];
//flip state
if (pubState == "less") {
pubArray[pub_id] = "more";
}
else if (pubState == "more") {
pubArray[pub_id] = "less";
}
//convert array to string so we can store it in a cookie
stringPubArray = arrayToString(pubArray);
//write array to cookie
setCookie(globalCookieName,stringPubArray);
}
//toggleDisplay(...) changes visibility of publication & flips more / less text
function toggleDisplay(id,button_id,expand,contract) {
if (document.getElementById) {
var links = document.getElementById(id);
var toggleButton = document.getElementById(button_id);
if (links) {
if (links.style.display != "block") {
links.style.display = "block";
toggleButton.innerHTML=(contract);
}
else {
links.style.display = "none";
toggleButton.innerHTML=(expand);
}
}
}
}
//togglePublication(...) is called when you click on the [more]/[less] link on a publication
function togglePublication(id,button_id,expand,contract) {
//set default values
if (typeof expand == 'undefined' ) expand = moreButton;
if (typeof contract == 'undefined' ) contract = lessButton;
//change the value stored in cookie for this id
modifyCookie(id);
//toggle the display of the more/less link and expand or contract
toggleDisplay(id,button_id,expand,contract);
}
//automatically called when the page is loaded
//check to see if cookie exists, if not create it, if it is set, open appropriate publications
//window.onload = function () {
function useCookie() {
window.onload = function () {
var totalPublications = publicationCount();
var i; //counter
var id;
//if the visitor has not been here before - there will be no cookie
if (document.cookie.length == 0) {
var pubArray = new Array(totalPublications);
//populate the array with default value
for (i=0; i