// JavaScript Document

function ReadCookie(cookieName) {
 var theCookie=""+document.cookie;
 var ind=theCookie.indexOf(cookieName);
 if (ind==-1 || cookieName=="") return ""; 
 var ind1=theCookie.indexOf(';',ind);
 if (ind1==-1) ind1=theCookie.length; 
 return unescape(theCookie.substring(ind+cookieName.length+1,ind1));
}

function SetCookie(cookieName,cookieValue,nDays) {
 var today = new Date();
 var expire = new Date();
 if (nDays==null || nDays==0) nDays=1;
 expire.setTime(today.getTime() + 3600000*24*nDays);
 document.cookie = cookieName+"="+escape(cookieValue)
                 + ";expires="+expire.toGMTString();
}

function deleteCookie(cookieName)
{

 document.cookie = cookieName+"="+escape(' ')
 + ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

function appendCookie(cookieName, contenido)
{
	
	var newContenido = ReadCookie(cookieName);
	if (contenido == '' )
		SetCookie(cookieName,contenido,'1');
	else {
		deleteCookie(cookieName);
		SetCookie(cookieName, newContenido+'|'+contenido ,'1');
		//alert('Articulo agregado');
	}
	
	//alert(ReadCookie(cookieName));
}

function deleteFromCookie(cadena, cookieName) {
	
	//alert (cadena);
	var contenido = ReadCookie(cookieName);
	SetCookie(cookieName,contenido.replace('|'+cadena,''),'1'); 
	
}