function resizeSubseiten () {
   if (document.getElementById("subcontent")) {
        var minHght = document.getElementById("subcontent").offsetHeight;
        var pageHeight = document.getElementById("wrap_sub").offsetHeight;
        var windowHeight = document.documentElement.clientHeight;
        
        if(pageHeight < windowHeight) {
            document.getElementById("subcontent_middle").style.height = (document.documentElement.clientHeight - 200) + 'px';
        }        
    }
}
/*window.onload = resizeSubseiten;*/
 

function showAndHide ( id, link ){
    if ( document.getElementById(id).style.display!="none" ) {
      document.getElementById(id).style.display="none";
      if (link != null)
          link.className="closed";
    }
    else {
      document.getElementById(id).style.display="block";
      if (link!= null)
          link.className="opened";
    }
}