function showhide() {

  // hier wird der value des radio-buttons gespeichert  
  var myChecked = "";

  // zuerst alle div verstecken
  for (var i=0; i<=10; i++) 
	  document.getElementById('inp' + i).style.display = 'none';

  // ueber alle drei radio-buttons loopen, value holen
  for (var i=0; i<=2; i++) {
    if (document.getElementsByName('radio_02')[i].checked == true)
      myChecked = document.getElementsByName('radio_02')[i].value;
  }

  // je nach value die unterschiedlichen divs anzeigen
  if (myChecked == 'email') {
			document.getElementById('inp0').style.display = 'block';
			document.getElementById('inp1').style.display = 'block';
			document.getElementById('inp2').style.display = 'block';
			document.getElementById('inp3').style.display = 'block';
			document.getElementById('inp8').style.display = 'block';
			document.getElementById('inp9').style.display = 'block';
			document.getElementById('inp10').style.display = 'block';
  } else if (myChecked == "telefono") {
				document.getElementById('inp0').style.display = 'block';
				document.getElementById('inp1').style.display = 'block';
				document.getElementById('inp2').style.display = 'block';
				document.getElementById('inp3').style.display = 'block';
				document.getElementById('inp4').style.display = 'block';
				document.getElementById('inp9').style.display = 'block';
				document.getElementById('inp10').style.display = 'block';
  	} else if (myChecked == 'postal') {
					document.getElementById('inp0').style.display = 'block';
					document.getElementById('inp1').style.display = 'block';
					document.getElementById('inp2').style.display = 'block';
					document.getElementById('inp3').style.display = 'block';
					document.getElementById('inp5').style.display = 'block';
					document.getElementById('inp6').style.display = 'block';
					document.getElementById('inp7').style.display = 'block';
					document.getElementById('inp9').style.display = 'block';
					document.getElementById('inp10').style.display = 'block';
  		}
  }