function changeImages(name,file) {
	if (document.images)
		 eval('document.images["'+name+'"].src="'+file+'"')
}

function show_div(layername) {
  if (document.layers) {
    if (layername == "aviation") {
      document.aviation.visibility = "show";
      document.transportation.visibility = "hide";
      document.maritime.visibility = "hide";
      document.construction.visibility = "hide";
      document.company.visibility = "hide";
      return;
    }
    
    if (layername == "transportation") {
      document.aviation.visibility = "hide";
      document.transportation.visibility = "show";
      document.maritime.visibility = "hide";
      document.construction.visibility = "hide";
      document.company.visibility = "hide";
      return;
    }
    
    if (layername == "maritime") {
      document.aviation.visibility = "hide";
      document.transportation.visibility = "hide";
      document.maritime.visibility = "show";
      document.construction.visibility = "hide";
      document.company.visibility = "hide";
      return;
    }
    
    if (layername == "construction") {
      document.aviation.visibility = "hide";
      document.transportation.visibility = "hide";
      document.maritime.visibility = "hide";
      document.construction.visibility = "show";
      document.company.visibility = "hide";
      return;
    }
    
    if (layername == "company") {
      document.aviation.visibility = "hide";
      document.transportation.visibility = "hide";
      document.maritime.visibility = "hide";
      document.construction.visibility = "hide";
      document.company.visibility = "show";
      return;
    }
  }
  
	if (document.all) {
    
    if (layername == "aviation") {
      document.all["aviation"].style.visibility = "visible";
      document.all["transportation"].style.visibility = "hidden";
      document.all["maritime"].style.visibility = "hidden";
      document.all["construction"].style.visibility = "hidden";
      document.all["company"].style.visibility = "hidden";
      return;
    }
    
    if (layername == "transportation") {
      document.all["aviation"].style.visibility = "hidden";
      document.all["transportation"].style.visibility = "visible";
      document.all["maritime"].style.visibility = "hidden";
      document.all["construction"].style.visibility = "hidden";
      document.all["company"].style.visibility = "hidden";
      return;
    }
    
    if (layername == "maritime") {
      document.all["aviation"].style.visibility = "hidden";
      document.all["transportation"].style.visibility = "hidden";
      document.all["maritime"].style.visibility = "visible";
      document.all["construction"].style.visibility = "hidden";
      document.all["company"].style.visibility = "hidden";
      return;
    }
    
    if (layername == "construction") {
      document.all["aviation"].style.visibility = "hidden";
      document.all["transportation"].style.visibility = "hidden";
      document.all["maritime"].style.visibility = "hidden";
      document.all["construction"].style.visibility = "visible";
      document.all["company"].style.visibility = "hidden";
      return;
    }
    
    if (layername == "company") {
      document.all["aviation"].style.visibility = "hidden";
      document.all["transportation"].style.visibility = "hidden";
      document.all["maritime"].style.visibility = "hidden";
      document.all["construction"].style.visibility = "hidden";
      document.all["company"].style.visibility = "visible";
      return;
    }
  }
}

function hide_div() {
  if (document.layers) {
    document.aviation.visibility = "hide";
    document.transportation.visibility = "hide";
    document.maritime.visibility = "hide";
    document.construction.visibility = "hide";
    document.company.visibility = "hide";
    return;
  }
  
	if (document.all) {
    document.all["aviation"].style.visibility = "hidden";
    document.all["transportation"].style.visibility = "hidden";
    document.all["maritime"].style.visibility = "hidden";
    document.all["construction"].style.visibility = "hidden";
    document.all["company"].style.visibility = "hidden";
    return;
  }
}