if (document.images)  {
m_all = new Image
d_all = new Image
dz_all = new Image
o_all = new Image
oferty_all = new Image
m_all.src = 'grafika/m_all.jpg'
d_all.src = 'grafika/d_all.jpg'
dz_all.src = 'grafika/dz_all.jpg'
o_all.src = 'grafika/o_all.jpg'
oferty_all.src = 'grafika/top_oferty.jpg'
}  else  {
m_all = ""
d_all = ""
dz_all = ""
o_all = ""
oferty_all = ""
document.ofertyAll = ""
}