var last_prod_set;
var next_prod_set;

function showProductPage(v_prod_set)
{
    next_prod_set = v_prod_set;

    if (last_prod_set) {
        togglePageNumLink(v_prod_set);
        togglePageNumLink(last_prod_set);

        var oObLastProd = document.getElementById(last_prod_set);
        if (oObLastProd)
            oObLastProd.style.display = "none";
    }

    var oObCurProd = document.getElementById(v_prod_set);
    if (oObCurProd)
        oObCurProd.style.display = "block";

    togglePageNumLink(v_prod_set);
    last_prod_set = v_prod_set;
}

function togglePageNumLink(v_cat_set)
{
    var l = document.getElementById('l_' + v_cat_set);

    if (l) {
        td = l.style.textDecoration;
        if (td == 'underline') {
            l.style.textDecoration = 'none';
        } else {
            l.style.textDecoration = 'underline';
        }
    }
}