nav1on = new Image(); 
nav1on.src = "images/htmlnav/inav_home_on.gif";
nav1off = new Image(); 
nav1off.src = "images/htmlnav/inav_home_off.gif";

nav2on = new Image(); 
nav2on.src = "images/htmlnav/inav_aboutus_on.gif";
nav2off = new Image(); 
nav2off.src = "images/htmlnav/inav_aboutus_off.gif";

nav3on = new Image(); 
nav3on.src = "images/htmlnav/inav_rental_collection_on.gif";
nav3off = new Image(); 
nav3off.src = "images/htmlnav/inav_rental_collection_off.gif";

nav4on = new Image(); 
nav4on.src = "images/htmlnav/inav_gallery_on.gif";
nav4off = new Image(); 
nav4off.src = "images/htmlnav/inav_gallery_off.gif";

nav5on = new Image(); 
nav5on.src = "images/htmlnav/inav_news_on.gif";
nav5off = new Image(); 
nav5off.src = "images/htmlnav/inav_news_off.gif";

nav6on = new Image(); 
nav6on.src = "images/htmlnav/inav_contact_on.gif";
nav6off = new Image(); 
nav6off.src = "images/htmlnav/inav_contact_off.gif";