// Place your application-specific JavaScript functions and classes here
// This file is automatically included by javascript_include_tag :defaults
function swap_img_on(id) {
    swap_img(id, id + '_on.gif');
}

function swap_img_off(id) {
    swap_img(id, id + '_off.gif');
}

function swap_img(id, name) {
    var e = document.getElementById(id);
    e.src = '/images/' + name;
}