abouton= new Image();
abouton.src= 'img/aboutus_nav_on.gif';
aboutoff= new Image();
aboutoff.src= 'img/aboutus_nav_off.gif';
contacton= new Image();
contacton.src= 'img/contact_nav_on.gif';
contactoff= new Image();
contactoff.src= 'img/contact_nav_off.gif';
privacyon= new Image();
privacyon.src= 'img/privacy_nav_on.gif';
privacyoff= new Image();
privacyoff.src= 'img/privacy_nav_off.gif';
legalon= new Image();
legalon.src= 'img/legal_nav_on.gif';
legaloff= new Image();
legaloff.src= 'img/legal_nav_off.gif';