function isEmailAddr(email)
{
  var result = false
  var theStr = new String(email)
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}


function checkForm() { 
    if( !(document.contactForm.Frage1[0].checked || document.contactForm.Frage1[1].checked || document.contactForm.Frage1[2].checked || document.contactForm.Frage1[3].checked || document.contactForm.Frage1[4].checked || document.contactForm.Frage1[5].checked) )
      { alert( "Bitte füllen Sie Frage 1 aus." );
	  contactForm.Frage1[0].focus();
        return false; }
    if( !(document.contactForm.Frage2[0].checked || document.contactForm.Frage2[1].checked || document.contactForm.Frage2[2].checked || document.contactForm.Frage2[3].checked || document.contactForm.Frage2[4].checked || document.contactForm.Frage2[5].checked) )
      { alert( "Bitte füllen Sie Frage 2 aus." );
	  contactForm.Frage2[0].focus();
        return false; }
    if( !(document.contactForm.Frage3[0].checked || document.contactForm.Frage3[1].checked || document.contactForm.Frage3[2].checked || document.contactForm.Frage3[3].checked || document.contactForm.Frage3[4].checked || document.contactForm.Frage3[5].checked) )
      { alert( "Bitte füllen Sie Frage 3 aus." );
	  contactForm.Frage3[0].focus();
        return false; }
    if( !(document.contactForm.Frage4[0].checked || document.contactForm.Frage4[1].checked || document.contactForm.Frage4[2].checked || document.contactForm.Frage4[3].checked || document.contactForm.Frage4[4].checked || document.contactForm.Frage4[5].checked) )
      { alert( "Bitte füllen Sie Frage 4 aus." );
	  contactForm.Frage4[0].focus();
        return false; }
    if( !(document.contactForm.Frage5[0].checked || document.contactForm.Frage5[1].checked || document.contactForm.Frage5[2].checked || document.contactForm.Frage5[3].checked || document.contactForm.Frage5[4].checked || document.contactForm.Frage5[5].checked) )
      { alert( "Bitte füllen Sie Frage 5 aus." );
	  contactForm.Frage5[0].focus();
        return false; }
    if( !(document.contactForm.Frage6[0].checked || document.contactForm.Frage6[1].checked || document.contactForm.Frage6[2].checked || document.contactForm.Frage6[3].checked || document.contactForm.Frage6[4].checked || document.contactForm.Frage6[5].checked) )
      { alert( "Bitte füllen Sie Frage 6 aus." );
	  contactForm.Frage6[0].focus();
        return false; }
    if( !(document.contactForm.Frage7[0].checked || document.contactForm.Frage7[1].checked || document.contactForm.Frage7[2].checked || document.contactForm.Frage7[3].checked || document.contactForm.Frage7[4].checked || document.contactForm.Frage7[5].checked) )
      { alert( "Bitte füllen Sie Frage 7 aus." );
	  contactForm.Frage7[0].focus();
        return false; }
    if( !(document.contactForm.Frage8[0].checked || document.contactForm.Frage8[1].checked || document.contactForm.Frage8[2].checked || document.contactForm.Frage8[3].checked || document.contactForm.Frage8[4].checked || document.contactForm.Frage8[5].checked) )
      { alert( "Bitte füllen Sie Frage 8 aus." );
	  contactForm.Frage8[0].focus();
        return false; }
    if( !(document.contactForm.Frage9[0].checked || document.contactForm.Frage9[1].checked || document.contactForm.Frage9[2].checked || document.contactForm.Frage9[3].checked || document.contactForm.Frage9[4].checked || document.contactForm.Frage9[5].checked) )
      { alert( "Bitte füllen Sie Frage 9 aus." );
	  contactForm.Frage9[0].focus();
        return false; }
    if( !(document.contactForm.Frage10[0].checked || document.contactForm.Frage10[1].checked || document.contactForm.Frage10[2].checked || document.contactForm.Frage10[3].checked || document.contactForm.Frage10[4].checked || document.contactForm.Frage10[5].checked) )
      { alert( "Bitte füllen Sie Frage 10 aus." );
	  contactForm.Frage10[0].focus();
        return false; }
    if( !(document.contactForm.Frage11[0].checked || document.contactForm.Frage11[1].checked || document.contactForm.Frage11[2].checked || document.contactForm.Frage11[3].checked || document.contactForm.Frage11[4].checked || document.contactForm.Frage11[5].checked) )
      { alert( "Bitte füllen Sie Frage 11 aus." );
	  contactForm.Frage11[0].focus();
        return false; }
    if( !(document.contactForm.Frage12[0].checked || document.contactForm.Frage12[1].checked || document.contactForm.Frage12[2].checked || document.contactForm.Frage12[3].checked || document.contactForm.Frage12[4].checked || document.contactForm.Frage12[5].checked) )
      { alert( "Bitte füllen Sie Frage 12 aus." );
	  contactForm.Frage12[0].focus();
        return false; }
    if( !(document.contactForm.Frage13[0].checked || document.contactForm.Frage13[1].checked || document.contactForm.Frage13[2].checked || document.contactForm.Frage13[3].checked || document.contactForm.Frage13[4].checked || document.contactForm.Frage13[5].checked) )
      { alert( "Bitte füllen Sie Frage 13 aus." );
	  contactForm.Frage13[0].focus();
        return false; }
    if( !(document.contactForm.Frage14[0].checked || document.contactForm.Frage14[1].checked || document.contactForm.Frage14[2].checked || document.contactForm.Frage14[3].checked || document.contactForm.Frage14[4].checked || document.contactForm.Frage14[5].checked) )
      { alert( "Bitte füllen Sie Frage 13 aus." );
	  contactForm.Frage14[0].focus();
        return false; }
    if( !(document.contactForm.Frage15[0].checked || document.contactForm.Frage15[1].checked || document.contactForm.Frage15[2].checked || document.contactForm.Frage15[3].checked || document.contactForm.Frage15[4].checked || document.contactForm.Frage15[5].checked) )
      { alert( "Bitte füllen Sie Frage 15 aus." );
	  contactForm.Frage15[0].focus();
        return false; }
    if( !(document.contactForm.Frage16[0].checked || document.contactForm.Frage16[1].checked || document.contactForm.Frage16[2].checked || document.contactForm.Frage16[3].checked || document.contactForm.Frage16[4].checked || document.contactForm.Frage16[5].checked) )
      { alert( "Bitte füllen Sie Frage 16 aus." );
	  contactForm.Frage16[0].focus();
        return false; }
    if( !(document.contactForm.Frage17[0].checked || document.contactForm.Frage17[1].checked || document.contactForm.Frage17[2].checked || document.contactForm.Frage17[3].checked || document.contactForm.Frage17[4].checked || document.contactForm.Frage17[5].checked) )
      { alert( "Bitte füllen Sie Frage 17 aus." );
	  contactForm.Frage17[0].focus();
        return false; }
    if( !(document.contactForm.Frage18[0].checked || document.contactForm.Frage18[1].checked || document.contactForm.Frage18[2].checked || document.contactForm.Frage18[3].checked || document.contactForm.Frage18[4].checked || document.contactForm.Frage18[5].checked) )
      { alert( "Bitte füllen Sie Frage 18 aus." );
	  contactForm.Frage18[0].focus();
        return false; }
    if( !(document.contactForm.Frage19[0].checked || document.contactForm.Frage19[1].checked || document.contactForm.Frage19[2].checked || document.contactForm.Frage19[3].checked || document.contactForm.Frage19[4].checked || document.contactForm.Frage19[5].checked) )
      { alert( "Bitte füllen Sie Frage 19 aus." );
	  contactForm.Frage19[0].focus();
        return false; }
    if( !(document.contactForm.Frage20[0].checked || document.contactForm.Frage20[1].checked || document.contactForm.Frage20[2].checked || document.contactForm.Frage20[3].checked || document.contactForm.Frage20[4].checked || document.contactForm.Frage20[5].checked) )
      { alert( "Bitte füllen Sie Frage 20 aus." );
	  contactForm.Frage20[0].focus();
        return false; }
    if( !(document.contactForm.Frage21[0].checked || document.contactForm.Frage21[1].checked || document.contactForm.Frage21[2].checked || document.contactForm.Frage21[3].checked || document.contactForm.Frage21[4].checked || document.contactForm.Frage21[5].checked) )
      { alert( "Bitte füllen Sie Frage 21 aus." );
	  contactForm.Frage21[0].focus();
        return false; }
    if( !(document.contactForm.Frage22[0].checked || document.contactForm.Frage22[1].checked || document.contactForm.Frage22[2].checked || document.contactForm.Frage22[3].checked || document.contactForm.Frage22[4].checked || document.contactForm.Frage22[5].checked) )
      { alert( "Bitte füllen Sie Frage 22 aus." );
	  contactForm.Frage22[0].focus();
        return false; }
    if( !(document.contactForm.Frage23[0].checked || document.contactForm.Frage23[1].checked || document.contactForm.Frage23[2].checked || document.contactForm.Frage23[3].checked || document.contactForm.Frage23[4].checked || document.contactForm.Frage23[5].checked) )
      { alert( "Bitte füllen Sie Frage 23 aus." );
	  contactForm.Frage23[0].focus();
        return false; }
    if( !(document.contactForm.Frage24[0].checked || document.contactForm.Frage24[1].checked || document.contactForm.Frage24[2].checked || document.contactForm.Frage24[3].checked || document.contactForm.Frage24[4].checked || document.contactForm.Frage24[5].checked) )
      { alert( "Bitte füllen Sie Frage 24 aus." );
	  contactForm.Frage24[0].focus();
        return false; }

		
	if( document.contactForm.firma.value == "" )
      { alert( "Bitte füllen das Feld Firma aus." );
	  contactForm.firma.focus();
        return false; }
	if( document.contactForm.branche.value == "" )
      { alert( "Bitte füllen Sie das Feld Branche aus." );
	  contactForm.branche.focus();
        return false; }
		
	if( document.contactForm.name.value == "" )
      { alert( "Bitte füllen Sie das Feld Name aus." );
	  contactForm.name.focus();
        return false; }

	if (document.contactForm.email.value == "")
	  { alert("Bitte füllen Sie das Feld E-Mail aus.");
	  contactForm.email.focus();
      return (false); }
	if (!isEmailAddr(document.contactForm.email.value))
  	  { alert("Bitte geben Sie eine gültige E-Mail an!");
      contactForm.email.focus();
      return (false);}
	if (document.contactForm.email.value.length < 7)
  	  { alert("Bitte geben Sie eine gültige E-Mail an!");
      contactForm.email.focus();
      return (false); }
	  
	if( document.contactForm.telefon.value == "" )
      { alert( "Bitte füllen Sie das Feld Telefon aus." );
	  contactForm.telefon.focus();
        return false; }		
		
 
//alert( "Alle Eingaben o.k." );
//    return true;
}