if (document.images) {
 img1_on =new Image();  img1_on.src ="images/m_ofirmie_on.jpg"; 
 img1_off=new Image();  img1_off.src="images/m_ofirmie_off.jpg"; 
 
 img2_on =new Image();  img2_on.src ="images/m_oferta_on.jpg"; 
 img2_off=new Image();  img2_off.src="images/m_oferta_off.jpg"; 
 
 img3_on =new Image();  img3_on.src ="images/m_galeria_on.jpg"; 
 img3_off=new Image();  img3_off.src="images/m_galeria_off.jpg"; 
 
 img4_on =new Image();  img4_on.src ="images/m_kontakt_on.jpg"; 
 img4_off=new Image();  img4_off.src="images/m_kontakt_off.jpg"; 
}

function movr(k) {
 if (document.images) 
  eval('document.img'+k+'.src=img'+k+'_on.src');
}

function mout(k) {
 if (document.images) 
  eval('document.img'+k+'.src=img'+k+'_off.src');
}

function handleOver() {
 if (document.images) 
  document.imgName.src=img_on.src;
}

function handleOut() {
 if (document.images) 
  document.imgName.src=img_off.src;
}