var mainnav_home_off   = new Image();
var mainnav_home_roll  = new Image();
var mainnav_aboutus_off   = new Image();
var mainnav_aboutus_roll  = new Image();
var mainnav_selfcare_off   = new Image();
var mainnav_selfcare_roll  = new Image();
var mainnav_healthyliving_off   = new Image();
var mainnav_healthyliving_roll  = new Image();
var mainnav_benefits_off   = new Image();
var mainnav_benefits_roll  = new Image();

var portal_aboutus_off  = new Image();
var portal_aboutus_roll  = new Image();
var portal_selfcare_off  = new Image();
var portal_selfcare_roll  = new Image();
var portal_healthyliving_off  = new Image();
var portal_healthyliving_roll  = new Image();
var portal_benefits_off  = new Image();
var portal_benefits_roll  = new Image();

mainnav_home_off.src   = 'images/mainnav_home_off.gif';
mainnav_home_roll.src  = 'images/mainnav_home_roll.gif';
mainnav_aboutus_off.src   = 'images/mainnav_aboutus_off.gif';
mainnav_aboutus_roll.src  = 'images/mainnav_aboutus_roll.gif';
mainnav_selfcare_off.src   = 'images/mainnav_selfcare_off.gif';
mainnav_selfcare_roll.src  = 'images/mainnav_selfcare_roll.gif';
mainnav_healthyliving_off.src   = 'images/mainnav_healthyliving_off.gif';
mainnav_healthyliving_roll.src  = 'images/mainnav_healthyliving_roll.gif';
mainnav_benefits_off.src   = 'images/mainnav_benefits_off.gif';
mainnav_benefits_roll.src  = 'images/mainnav_benefits_roll.gif';

portal_aboutus_off.src  = 'images/portal_aboutus_off.jpg';
portal_aboutus_roll.src  = 'images/portal_aboutus_roll.jpg';
portal_selfcare_off.src  = 'images/portal_selfcare_off.jpg';
portal_selfcare_roll.src  = 'images/portal_selfcare_roll.jpg';
portal_healthyliving_off.src  = 'images/portal_healthyliving_off.jpg';
portal_healthyliving_roll.src  = 'images/portal_healthyliving_roll.jpg';
portal_benefits_off.src  = 'images/portal_benefits_off.jpg';
portal_benefits_roll.src  = 'images/portal_benefits_roll.jpg';