DIV settati con JAVASCRIPT

[lake86]

prova cosi

window.onload=miaFunzione; // Esegue al termine del caricamento

function miafunzione(){
  var a = document.getElementById("Audio");
  var e = document.getElementById("Informatica");
  e.style.visibility == 'hidden'
  a.style.visibility == 'hidden'
}

e penso vada anche mettendo

  var a = document.getElementById("Audio");
  var e = document.getElementById("Informatica");
  e.style.visibility == 'hidden'
  a.style.visibility == 'hidden'
function Info() {
var a = document.getElementById("Audio");
var e = document.getElementById("Informatica");

    if (e.style.visibility == 'hidden') {
        e.style.visibility = 'visible';
        e.style.display = 'block';
		a.style.visibility = 'hidden';
		a.style.display = 'none';
    } else {
        e.style.visibility = 'hidden';
        e.style.display = 'block';
		a.style.visibility = 'visible';
		a.style.display = 'none';
    }
}

function Audio() {
var a = document.getElementById("Audio");
var e = document.getElementById("Informatica");

    if (a.style.visibility == 'hidden') {
			a.style.visibility = 'visible';
			a.style.display = 'block';
			e.style.visibility = 'hidden';
			e.style.display = 'none';
    } else {
        a.style.visibility = 'hidden';
        a.style.display = 'block';
		e.style.visibility = 'visible';
		e.style.display = 'none';
    }
}