function changePortfolioOption(index)
        {
            var currentIndex = document.getElementById('currentIndex').value;
            document.getElementById('portfolio-container_' + index).style.display = "";
            document.getElementById('portfolio-container_' + currentIndex).style.display = "none";
            document.getElementById('currentIndex').value = index;
        }

        function goForward()
        {
            var currentIndex = parseInt(document.getElementById('currentIndex').value);
            if ((currentIndex + 1) > 9)
            {
                currentIndex = 9;
            }
            changePortfolioOption(currentIndex + 1);
        }

        function goBack()
        {
            var currentIndex = parseInt(document.getElementById('currentIndex').value);
            if ((currentIndex - 1) < 0)
            {
                currentIndex = 0;
            }
            changePortfolioOption(currentIndex - 1);
        }