var hp_what_off = new Image();
hp_what_off.src = 'images/hp_nav_what_off.gif';
var hp_what_on = new Image();
hp_what_on.src = 'images/hp_nav_what_on.gif';

var hp_wksp_off = new Image();
hp_wksp_off.src = 'images/hp_nav_wksp_off.gif';
var hp_wksp_on = new Image();
hp_wksp_on.src = 'images/hp_nav_wksp_on.gif';

var hp_clients_off = new Image();
hp_clients_off.src = 'images/hp_nav_clients_off.gif';
var hp_clients_on = new Image();
hp_clients_on.src = 'images/hp_nav_clients_on.gif';

var hp_news_off = new Image();
hp_news_off.src = 'images/hp_nav_news_off.gif';
var hp_news_on = new Image();
hp_news_on.src = 'images/hp_nav_news_on.gif';

var hp_tips_off = new Image();
hp_tips_off.src = 'images/hp_nav_tips_off.gif';
var hp_tips_on = new Image();
hp_tips_on.src = 'images/hp_nav_tips_on.gif';

var hp_contact_off = new Image();
hp_contact_off.src = 'images/hp_nav_contact_off.gif';
var hp_contact_on = new Image();
hp_contact_on.src = 'images/hp_nav_contact_on.gif';