function childmenu(id) {

for (var i = 1; i<=5; i++) {

 if(document.getElementById('pm'+i)) {
  document.getElementById('pm'+i).style.backgroundImage = "url(img/menu/menu_"+i+"_off.gif)";
  document.getElementById('pm'+i).style.color = "#181512";
  document.getElementById('childmenu0'+i).style.display = 'none';  
 }

}

 if(document.getElementById('pm'+id)) {
  document.getElementById('pm'+id).style.backgroundImage = "url(img/menu/menu_"+id+"_on.gif)";
  document.getElementById('pm'+id).style.color = "#792123"; 
  document.getElementById('childmenu0'+id).style.display = 'block';   
 }

}



function siteSize(art) {

 var site_1 = document.body.scrollHeight;
 var site_2 = document.body.offsetHeight
 if (site_1 > site_2) // alle außer Mac Explorer
 {
  seitenbreite = document.body.scrollWidth;
  seitenhoehe  = document.body.scrollHeight;
 }
 else // Mac Explorer
      // Explorer 6 Strict, Mozilla und Safari
 {
  seitenbreite = document.documentElement.scrollWidth;
  seitenhoehe  = document.documentElement.scrollHeight;
  
 }
  document.getElementById('overlayer').style.height = seitenhoehe + 'px';
}