if (document.images) {
 home_out = new Image(); home_out.src="/img/bpl/but_home.png"; 
 home_over  = new Image(); home_over.src  ="/img/bpl/but_home_over.png"; 

 manual_out = new Image(); manual_out.src="/img/bpl/but_manual.png"; 
 manual_over  = new Image(); manual_over.src  ="/img/bpl/but_manual_over.png"; 
 
 myaccount_out = new Image();  myaccount_out.src="/img/bpl/but_my-account.png"; 
 myaccount_over  = new Image(); myaccount_over.src  ="/img/bpl/but_my-account_over.png"; 
 
 register_out = new Image(); register_out.src="/img/bpl/but_register.png"; 
 register_over  = new Image(); register_over.src  ="/img/bpl/but_register_over.png"; 

 faq_out = new Image(); faq_out.src="/img/bpl/but_faq.png"; 
 faq_over  = new Image(); faq_over.src  ="/img/bpl/but_faq_over.png"; 

 contact_out = new Image(); contact_out.src="/img/bpl/but_contact.png"; 
 contact_over  = new Image(); contact_over.src  ="/img/bpl/but_contact_over.png"; 

 forum_out = new Image(); forum_out.src="/img/bpl/but_forum.png"; 
 forum_over  = new Image(); forum_over.src  ="/img/bpl/but_forum_over.png"; 

}

function NButton(btName) {
 if (document.images)
  eval('document.'+btName+'.src='+btName+'_out.src');
}

function OButton(btName) {
 if (document.images)
  eval('document.'+btName+'.src='+btName+'_over.src');
}