/* This code handles Discovery "top hat" navigation image rollovers */

var nav_images = {
    'dh_nav_1' : 'diseases-conditions',
    'dh_nav_2' : 'diet-fitness',
    'dh_nav_3' : 'healthy-living',
    'dh_nav_4' : 'mental-health',
    'dh_nav_5' : 'pregnancy-parenting',
    'dh_nav_6' : 'sex-relationships',
    'dh_nav_7' : 'tools',
    'dh_nav_8' : 'on-tv',
    'dh_nav_9' : 'marketplace'
}
var res_root = '/resources/partners/discovery-health/images/custom-header/';
function switch_dh_nav_on(img_id) {
    img_element = document.getElementById(img_id);
    if (img_element) {
        img_element.src = res_root + nav_images[img_id] + '-on.jpg';
    }
}
function switch_dh_nav_off(img_id) {
    img_element = document.getElementById(img_id);
    if (img_element) {
        img_element.src = res_root + nav_images[img_id] + '.jpg';
    }
}