var ie, w3c;

function init(){
        ie = document.all;
        w3c = document.documentElement;
}

init();

function showinhalt(){
        if(ie){
          document.all.inhalt.style.visibility = 'visible';
        }
        else if(w3c){
          document.getElementById('inhalt').style.visibility = 'visible';
        }
}

function hideladen(){
        if(ie){
          document.all.laden.style.visibility = 'hidden';
        }
        else if(w3c){
          document.getElementById('laden').style.visibility = 'hidden';
        }
}