function write_us_confirm()
    {
      var mail = self.document.forms.form.sender.value;
      if (mail!="" && mail!=undefined)
      {
          return true;
      }
      else
      {
          alert("Nezadali ste váš e-mail!");
          return false;
      }
    }
    
    function order_confirm()
    {
      var mail = self.document.forms.form.mail.value;
      var phone = self.document.forms.form.phone.value;
      var name1 = self.document.forms.form.name1.value;
      var street1 = self.document.forms.form.street1.value;
      var city1 = self.document.forms.form.city1.value;
      var name2 = self.document.forms.form.name2.value;
      var street2 = self.document.forms.form.street2.value;
      var city2 = self.document.forms.form.city2.value;
      var company = self.document.forms.form.company_yesno.value;
      var ico = self.document.forms.form.ico.value;
      var dic = self.document.forms.form.dic.value;

      var result = false;

      if (mail != "" && phone != "" && name1 != "" && street1 != "" && city1 != "")
      {
          var result = true;
      }
      else
      {
          alert("Nevyplnili ste všechna povinná pole! Povinná pole jsou označeny hvězdičkou (*) !");
      }
      
      return result;
    }