LES COOKIES ET JAVASCRIPT

function Cookie(sName, sFormat, sValue)
{
	var argc = Cookie.arguments.length;
	
	/*attributes*/
	if(sFormat != "GET" && sFormat != "get")
	{
		this.name = sName;
		this.format = sFormat;
		this.value = (argc > 2) ? (sValue) : ("");
		date_exp = new Date();
		date_exp.setTime(date_exp.getTime()+((argc > 2) ? (iExpiration) : (365*24*3600)));
		this.expiration = date_exp;
		if(this.format == "JSON"){this.value = this.name+'={anonymousAttribute:""};';}
		if(argc > 1){this.saveCookie();}
	}
	if(sFormat == "GET" || sFormat == "get")
	{
		this.name = sName;
		this.value = this.getCookie(sName);
		date_exp = new Date();
		date_exp.setTime(date_exp.getTime()+((argc > 2) ? (iExpiration) : (365*24*3600)));
		this.expiration = date_exp;
		this.format = (/=\{.+\};/i.test(this.value)==true) ? "JSON" : "STR";

	}
}

/* Methodes */
Cookie.prototype.getCookieVal = function(offset) 
{
	var endstr=document.cookie.indexOf (";", offset);
	if (endstr==-1)
	endstr=document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
};
Cookie.prototype.getCookie = function (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 Cookie.prototype.getCookieVal (j);
		}
		i=document.cookie.indexOf(" ",i)+1;
		if (i==0){break;}
	}
		return null;
};
Cookie.prototype.saveCookie = function ()
{
	var expires= this.expiration;
	document.cookie=this.name+"="+escape(this.value)+((expires==null) ? "" : ("; expires="+expires.toGMTString()))+""+""+"";
	if(this.format == "JSON")
	{
		eval("this.attributes="+(this.value.substring(this.value.lastIndexOf("{"),this.value.lastIndexOf(";")))+";");
	}
};
Cookie.prototype.setValue = function (newValue, bContinue)
{
	if(this.format == "STR")
	{
		this.value = (bContinue == false) ? newValue : this.value+newValue;
		Cookie.prototype.saveCookie();
		return true;
	}
	else
	{
		this.value = newValue;
		Cookie.prototype.saveCookie();
		return true;
	}
};
Cookie.prototype.setExpire = function (iExpire, sUnity)
{
	var eArgv = this.setExpire.arguments;
	var eArgc = this.setExpire.arguments.length;
	if(eArgc >= 1 && sUnity != "until"){FoU = "for";}
	if(eArgc > 1 && sUnity == "until"){FoU = "until";}
	if(FoU == "for")
	{
		if(sUnity == "secondes" || sUnity == "s" || sUnity == undefined || sUnity == "sec")
		{
			date_exp.setTime(date_exp.getTime()+(iExpire));
			this.expiration = date_exp;
		}
		if(sUnity == "heures" || sUnity == "h" || sUnity == "hours")
		{
			date_exp.setTime(date_exp.getTime()+(iExpire*3600));
			this.expiration = date_exp;
		}			
		if(sUnity == "jours" || sUnity == "j" || sUnity == "d" || sUnity == "days")
		{
			date_exp.setTime(date_exp.getTime()+(iExpire*3600*24));
			this.expiration = date_exp;
		}	
		if(sUnity == "semaines" || sUnity == "sem" || sUnity == "weeks" || sUnity == "w")
		{
			date_exp.setTime(date_exp.getTime()+(iExpire*3600*24*7));
			this.expiration = date_exp;
		}	
		if(sUnity == "mois" || sUnity == "m" || sUnity == "month")
		{
			date_exp.setTime(date_exp.getTime()+(iExpire*3600*24*30));
			this.expiration = date_exp;
		}	
		if(sUnity == "annees" || sUnity == "a" || sUnity == "years" || sUnity == "y" || sUnity == "années")
		{
			date_exp.setTime(date_exp.getTime()+(iExpire*3600*24*365));
			this.expiration = date_exp;
		}	
	}
	if(FoU == "until")
	{
		jour = iExpire.split(/\//)[0];
		mois = iExpire.split(/\//)[1];
		annee = iExpire.split(/\//)[2];
		timeStamp = ((parseInt(annee)-1970)*365*24*3600)+(parseInt(mois)*31*24*3600)+(parseInt(jour)*24*3600);
		date_exp.setTime(timeStamp);
		this.expiration = date_exp;
	}
	Cookie.prototype.saveCookie();
};
Cookie.prototype.cookieEnabled = function()
{
	return navigator.cookieEnabled;
};
Cookie.prototype.removeCookie = function(name) 
{
	var exp = new Date();
	exp.setTime(exp.getTime() - 100000);
	var cValue  = Cookie.prototype.getCookie(name);
	document.cookie = name+"="+cValue+"; expires="+exp.toGMTString();
};
Cookie.prototype.addAttribute = function(sAttribute, sValue)
{
	if(this.format == "JSON")
	{
		this.value = this.value.substring(0, this.value.lastIndexOf("};"));
		this.value += ","+sAttribute+':"'+sValue+'"';
		this.value += "};";
		Cookie.prototype.saveCookie();
		return true;
	}
	else
	{
		return false;
	}
};
Cookie.prototype.resetCookie = function()
{
	if(this.format == "STR")
	{
		this.value = "";
	}
	if(this.format == "JSON")
	{
		this.name+'={anonymousAttribute:""};';
	}
	Cookie.prototype.saveCookie();
	return true;
};
Cookie.prototype.deleteAttribute = function(sAttributeName)
{
	if(this.format == "JSON")
	{
		eval(this.value)
		eval('sAttribute = '+this.name+'[sAttributeName];');
		var reg = new RegExp(','+sAttributeName+':"'+sAttribute+'"');
		this.value = this.value.replace(reg, "");
		Cookie.prototype.saveCookie();
		return true;
	}
	else
	{
		return false;
	}
};
Cookie.prototype.editAttribute = function(sAttributeName, sNewValue)
{
	if(this.format == "JSON")
	{
		Cookie.prototype.deleteAttribute(sAttributeName);
		Cookie.prototype.addAttribute(sAttributeName, sNewValue);
		return true;
	}
	else
	{
		return false;
	}
};
Cookie.prototype.setFormat = function(sFormat)
{
	if(sFormat == "STR" || Sformat == "JSON")
	{
		this.format = sFormat;
		return true;
	}
	else
	{
		return false;
	}
};

/* Exemple d'utilisation */
cookie1 = new Cookie("cook1", "STR", "okay");
alert(cookie1.value);

cookie2 = new Cookie("cook2", "JSON")
cookie2.addAttribute("cookie1", cookie2.getAttribute("cook1"));
alert(cookie2.attributes.cookie1);