function CreateCookie(name,value,days)
{
if (days)
{
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
var expires = "; expires="+date.toGMTString();
}
else var expires = "";
document.cookie = name+"="+value+expires+"; path=/";
}
function ReadCookie(name)
{
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++)
{
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
}
function EraseCookie(name)
{
CreateCookie(name,"",-1);
}
var NAMEVALUE_DELIMITER = "*";
var PARAM_DELIMITER = ",";
var EXPIRES = 30;
function SetCookieParam(cookieName, paramName, paramValue)
{
if (paramName == "" || paramName == null)
return;
var currentVal = GetCookieParamValue(cookieName, paramName);
if (currentVal == null) {
currentVal = paramName + NAMEVALUE_DELIMITER + paramValue + PARAM_DELIMITER
var newCookie = currentVal;
if (ReadCookie(cookieName) != null)
newCookie = ReadCookie(cookieName) + currentVal;
CreateCookie(cookieName,newCookie, EXPIRES)
} else {
var cookieVal = ReadCookie(cookieName);
cookieVal = cookieVal.replace(paramName + NAMEVALUE_DELIMITER + currentVal + PARAM_DELIMITER,
paramName + NAMEVALUE_DELIMITER + paramValue + PARAM_DELIMITER);
CreateCookie(cookieName,cookieVal, EXPIRES)
}
}
function GetCookieParamValue(cookieName, paramName)
{
var retVal = null;
var nv = GetCookieNameValues(cookieName);
for(var i=0;i < nv.length;i++){
var c = nv[i];
var pair = c.split(NAMEVALUE_DELIMITER);
if (pair){
if (pair[0] != "" && pair[0]== paramName) {
retVal = pair[1];
}
}
}
return retVal;
}
function GetCookieNameValues(cookieName)
{
var cookieValue = ReadCookie(cookieName);
if (cookieValue == null) {
cookieValue = "";
CreateCookie(cookieName,cookieValue, EXPIRES)
}
var nv = cookieValue.split(PARAM_DELIMITER);
return nv;
}
/* Some extra functions. They're only here to allow me to add some
alerts to the example */
function saveIt(name)
{
var x = document.forms[0].cookievalue.value;
if (!x)
alert('Please fill in a value in the input box.');
else
CreateCookie(name,x,7);
}
function readIt(name)
{
alert('The value of the cookie is ' + ReadCookie(name));
}
function eraseIt(name)
{
EraseCookie(name);
alert('Cookie erased');
}
function setValue(name)
{
SetCookieParam(name, document.forms[0].paramname.value, document.forms[0].paramvalue.value)
document.forms[0].cookievalue.value = ReadCookie(name);
}
function getValue(cookiename, paramname)
{
alert("value=" + GetCookieParamValue(cookiename, paramname));
}
function init()
{
for (var i=1;i<3;i++)
{
var x = ReadCookie('ppkcookie' + i);
if (x) alert('Cookie ppkcookie' + i + '\nthat you set on a previous visit, is still active.\nIts value is ' + x);
}
}
/*
Create cookie 1
Read cookie 1
Erase cookie 1
Get Param
Set Param.