function formcheck(){

if (document.formular.Name.value=="")
  { alert ("Please enter your name");
   document.formular.Name.focus();
   return false; }
  
if (document.formular.Firma.value=="")
  { alert ("Please enter your company name");
   document.formular.Firma.focus();
   return false; }

if (document.formular.Email.value=="")
  { alert ("Please enter your email address");
   document.formular.Email.focus();
   return false; }

if (document.formular.Email.value.indexOf('@')==-1)
{ alert ("This is not a correct email address");
  document.formular.Email.focus();
  return false; }

if (document.formular.Email.value.indexOf('.')==-1)
{ alert ("This is not a correct email address");
  document.formular.Email.focus();
  return false; }

var wert = 0;
if (document.formular.Liste.checked==true)
   {wert = 2; }

if (document.formular.LVZ.checked==true)
   {wert = 2; }

if (wert <=1 )
  { alert ("Please choose a file");
    return false; }


}