// Flagen rollover/rollout.
toogle_imgs = {
    toogle_img: function(img, mode) { 
        var look_for = (mode == 'over') ? '_n.gif' : '_a.gif';
        var replacement = (mode == 'over') ? '_a.gif' : '_n.gif';

        img.src = img.src.replace(look_for, replacement);
    },
    init: function(id) {
        var element = document.getElementById(id);
        var imgs = element.getElementsByTagName('img');

        for(i = 0; i < imgs.length; i++) {
            imgs[i].onmouseover = function() {
                toogle_imgs.toogle_img(this, 'over');
            };

            imgs[i].onmouseout = function() {
                toogle_imgs.toogle_img(this, 'out');
            };
        }
    }
};

// Onload Wrapper.
window.onload = function() {  
    toogle_imgs.init('link_list');
    toogle_imgs.init('project_list');
};