div#header ul li a#produkte {
  background: url(../images/navigation_products.gif) no-repeat;
  display: block;
  height: 87px;
  width: 110px;
}
div#header ul li a#produkte-aktiv {
  background: url(../images/navigation_products_a.gif) no-repeat;
  display: block;
  height: 87px;
  width: 110px;
}div#header ul li a#presse {  background: url(../images/navigation_press.gif) no-repeat;  display: block;  height: 87px;  width: 107px;}div#header ul li a#presse-aktiv {  background: url(../images/navigation_press_a.gif) no-repeat;  display: block;  height: 87px;  width: 107px;}  

div#header ul li a#unternehmen {
  background: url(../images/navigation_company.gif) no-repeat;
  display: block;
  height: 87px;
  width: 119px;
}  
div#header ul li a#unternehmen-aktiv {
  background: url(../images/navigation_company_a.gif) no-repeat;
  display: block;
  height: 87px;
  width: 119px;
}