function show(param){

  if (document.all){
    document.all[param].style.visibility = "visible"

  } else if (document.layers){
    document.param.style.visibility = "visible"

  } else if (document.getElementById){
    document.getElementById(param).style.visibility = "visible"

  }

}

function hide(param){
  if (document.all){
    document.all[param].style.visibility = "hidden"

  } else if (document.layers){
    document.param.style.visibility = "hidden"

  } else if (document.getElementById){
    document.getElementById(param).style.visibility = "hidden"

  }
}

function showprodukte(){
  if (document.all){
    if (document.all.navigation_produkte.style.display == "block")
    {
         document.all.navigation_produkte.style.display = "none"
    }else
    {
         document.all.navigation_produkte.style.display = "block"
    }

  } else if (document.layers){
    if (document.navigation_produkte.style.display == "block")
    {
        document.navigation_produkte.style.display = "none"
    }else
    {
        document.navigation_produkte.style.display = "block"
    }

  } else if (document.getElementById){
    if (document.getElementById("navigation_produkte").style.display == "block")
    {
        document.getElementById("navigation_produkte").style.display = "none"
    }else
    {
        document.getElementById("navigation_produkte").style.display = "block"
    }

  }

}