home_button_img = new Image();
home_button_img.src = 'images/home_button.jpg';
home_button_img_on = new Image();
home_button_img_on.src = 'images/home_button_on.jpg';

about_button_img = new Image();
about_button_img.src = 'images/about_button.jpg';
about_button_img_on = new Image();
about_button_img_on.src = 'images/about_button_on.jpg';

qualify_button_img = new Image();
qualify_button_img.src = 'images/qualify_button.jpg';
qualify_button_img_on = new Image();
qualify_button_img_on.src = 'images/qualify_button_on.jpg';

resources_button_img = new Image();
resources_button_img.src = 'images/resources_button.jpg';
resources_button_img_on = new Image();
resources_button_img_on.src = 'images/resources_button_on.jpg';


function doLight(obj) {
e = obj.name + '_on.src';
src = eval(e);
obj.src = src;
}

function doDim(obj) {
e = obj.name + '.src';
src = eval(e);
obj.src = src;
}

function showLogin() {

if (document.getElementById('loginForm').style.height == '0px') {
var t = new Tween(document.getElementById('loginForm').style,'height',Tween.regularEaseIn,0,46,1,'px');
document.getElementById('loginForm').style.display = 'block';
document.getElementById('loginForm').style.height = '46px'; 
t.start();
} else {
var t = new Tween(document.getElementById('loginForm').style,'height',Tween.regularEaseOut,46,0,1,'px');
t.start();
//document.getElementById('loginForm').style.display = 'none';
}

}