function load_nav_graphics(sPage) {
  if (document.images) {
    if (sPage != 'index') {
      bhomeo = new Image(88,31)
      bhomeo.src = "pbu_homeo.gif"
      bhome = new Image(88,31)
      bhome.src = "pbu_home.gif"
    }
    if (sPage != "ioil" ) { 
      boilo = new Image(88,31)
      boilo.src = "pbu_oilo.gif"
      boil = new Image(88,31)
      boil.src = "pbu_oil.gif"
    }
    if (sPage != "ilinks" ) { 

      blinkso = new Image(88,31)
      blinkso.src = "pbu_linkso.gif"
      blinks = new Image(88,31)
      blinks.src = "pbu_links.gif"
    }
    if (sPage != "ipawp" ) { 
      bpawpo = new Image(88,31)
      bpawpo.src = "pbu_pawpo.png"
      bpawp = new Image(88,31)
      bpawp.src = "pbu_pawp.png"
    }
    if (sPage != "icontact" ) { 

      bcontacto = new Image(88,31)
      bcontacto.src = "pbu_contacto.png"
      bcontact = new Image(88,31)
      bcontact.src = "pbu_contact.png"
    }  
    if (sPage == "ipawp" 
    ||  sPage == "ipici_index") { 
     
      broscoeo = new Image(88,31)
      broscoeo.src = "pbu_roscoeo.gif"
      broscoe = new Image(88,31)
      broscoe.src = "pbu_roscoe.gif"

      bmomo = new Image(88,31)
      bmomo.src = "pbu_momo.gif"
      bmom = new Image(88,31)
      bmom.src = "pbu_mom.gif"

      bnamo = new Image(88,31)
      bnamo.src = "pbu_namo.gif"
      bnam = new Image(88,31)
      bnam.src = "pbu_nam.gif"

      bmaxo = new Image(88,31)
      bmaxo.src = "pbu_maxo.gif"
      bmax = new Image(88,31)
      bmax.src = "pbu_max.gif"

      blllbo = new Image(88,31)
      blllbo.src = "pbu_lllbo.png"
      blllb = new Image(88,31)
      blllb.src = "pbu_lllb.png"
    }  
  } 
}