function init()
{
    eval('document.getElementById("nav-image-' +
        g_currentSection + '").src =' +
        '"/images/nav_' + g_currentSection + '_on.gif"');
    preloadRollovers();
}

function roll(element, isOn)
{
    var elementId = element.id;
    var sectionPosition = elementId.lastIndexOf("-") + 1;
    var sectionName = elementId.substring(sectionPosition);
    if (sectionName == g_currentSection) {
        return;
    }
    var imageSrc = "/images/nav_" + sectionName + "_";

    if(isOn)
    {
        imageSrc += 'on';
    }
    else
    {
        imageSrc += 'off';
    }

    element.src = imageSrc + '.gif';

    return true;
}

function preloadRollovers()
{
    var sectionName;
    var preloadSrc;

    for(var i = 0; i < g_sectionNames.length; i++) {
        sectionName = g_sectionNames[i];
        preloadSrc = "/images/nav_" + sectionName + "_on.gif";
        g_sectionNames[i] = new Image();
        g_sectionNames[i].src = preloadSrc;
    }

    return;
}