function createFirstTimeCookie(name,value,days){
    var actualValue = readParentCookie(name);
    if(actualValue){
        if(actualValue.indexOf('vacio') != -1)//si el carrito esta vacio
            createFromParentCookie(name,value,days)
    }else{
        createFromParentCookie(name,value,days);
    }
}

function createFromParentCookie(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 createFromChildCookie(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 = "";
    
    parent.document.cookie = name+"="+value+expires+"; path=/";
}


function readParentCookie(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 readChildCookie(name) {
    var nameEQ = name + "=";
    var ca = parent.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 addValueFromParentCookie(name, value){
    //Valores de retorno: 1 se agregó correctamente; 2 ya existe; 3 error cookie
    var actualValue = readParentCookie(name);
    if(actualValue){
        if(actualValue.indexOf('vacio') != -1)//si el carrito esta vacio
            createFromParentCookie(name, value, 0);
        else{
            if(actualValue.indexOf(value) != -1)//si el valor ya existe
                return 2;
            else
                createFromParentCookie(name, actualValue + ',' + value, 0);
        }
        return 1;
    }
    return 3;
}

function addValueFromChildCookie(name, value){
    //Valores de retorno: 1 se agregó correctamente; 2 ya existe; 3 error cookie
    var actualValue = readChildCookie(name);
    if(actualValue){
        if(actualValue.indexOf('vacio') != -1)//si el carrito esta vacio
            createFromChildCookie(name, value, 0);
        else{
            if(actualValue.indexOf(value) != -1)//si el valor ya existe
                return 2;
            else
                createFromChildCookie(name, actualValue + ',' + value, 0);
        }
        return 1;
    }
    return 3;
}

function removeValueFromParentCookie(name, value){
    //Valores de retorno: 1 se quitó correctamente; 2 no existe; 3 error cookie
    var actualValue = readParentCookie(name);
    if(actualValue){
        if(actualValue.indexOf(value) != -1){//si el valor existe
            actualValue = actualValue.replace(',' + value, '');
            actualValue = actualValue.replace(value + ',', '');
            actualValue = actualValue.replace(',' + value + ',', ',');

            createFromParentCookie(name, actualValue, 0);
            return 1;
        }
        return 2;
    }
    return 3;
}

function removeValueFromChildCookie(name, value){
    //Valores de retorno: 1 se quitó correctamente; 2 no existe; 3 error cookie
    var actualValue = readChildCookie(name);
    if(actualValue){
        if(actualValue.indexOf(value) != -1){//si el valor existe
            actualValue = actualValue.replace(',' + value, '');
            actualValue = actualValue.replace(value + ',', '');
            actualValue = actualValue.replace(',' + value + ',', ',');

            createFromChildCookie(name, actualValue, 0);
            return 1;
        }
        return 2;
    }
    return 3;
}


function eraseFromParentCookie(name) {
    createFromParentCookie(name,"",-1);
}

function eraseFromChildCookie(name) {
    //createFromChildCookie(name,"",-1);
    createFromChildCookie(name,'vacio', 0);
}