var preload = new Image();
preload.src = "images/menu_about.jpg";

var preload = new Image();
preload.src = "images/menu_about_lit.jpg";

var preload = new Image();
preload.src = "images/menu_blog.jpg";

var preload = new Image();
preload.src = "images/menu_blog_lit.jpg";

var preload = new Image();
preload.src = "images/menu_links.jpg";

var preload = new Image();
preload.src = "images/menu_links_lit.jpg";

var preload = new Image();
preload.src = "images/menu_join.jpg";

var preload = new Image();
preload.src = "images/menu_join_lit.jpg";

var preload = new Image();
preload.src = "images/menu_spread.jpg";

var preload = new Image();
preload.src = "images/menu_spread_lit.jpg";

function swap_about( s ) {
    if ( s )
        document.getElementById('menu_about').src = "images/menu_about_lit.jpg";
    else
        document.getElementById('menu_about').src = "images/menu_about.jpg";
}

function swap_blog( s ) {
    if ( s )
        document.getElementById('menu_blog').src = "images/menu_blog_lit.jpg";
    else
        document.getElementById('menu_blog').src = "images/menu_blog.jpg";
}

function swap_links( s ) {
    if ( s )
        document.getElementById('menu_links').src = "images/menu_links_lit.jpg";
    else
        document.getElementById('menu_links').src = "images/menu_links.jpg";
}

function swap_join( s ) {
    if ( s )
        document.getElementById('menu_join').src = "images/menu_join_lit.jpg";
    else
        document.getElementById('menu_join').src = "images/menu_join.jpg";
}

function swap_spread( s ) {
    if ( s )
        document.getElementById('menu_spread').src = "images/menu_spread_lit.jpg";
    else
        document.getElementById('menu_spread').src = "images/menu_spread.jpg";
}