function pruefe()    {

      if(window.document.newsletter.Firma.value=="") 
      { 
         alert("Please register your company!"); 
         return false; 
      } 
	  
	  
	  if(window.document.newsletter.Anrede.value=="") 
      { 
         alert("Choose your salutation!"); 
         return false; 
      } 
	  

      if(window.document.newsletter.Vorname.value=="") 
      { 
         alert("Please fill in your forename"); 
         return false; 
      } 
	  
	  if(window.document.newsletter.Nachname.value=="") 
      { 
         alert("Please fill in your surname"); 
         return false; 
      } 
	  
	  
	  if(window.document.newsletter.email.value=="") 
      { 
         alert("Please fill in your e-mail adress"); 
         return false; 
      } 
	  
	  if(window.document.newsletter.land.value=="") 
      { 
         alert("Choose your country!"); 
         return false; 
      } 
	  
	  if(window.document.newsletter.Strasse.value=="") 
      { 
         alert("Please fill in the street and the house number"); 
         return false; 
      } 
	  
	  if(window.document.newsletter.PLZ_Ort.value=="") 
      { 
         alert("Please fill in the postcode/city"); 
         return false; 
      } 


/*	
	var res=true;
	var arrBoxen = document.getElementsByName("products[]");
	for (var i = 0; i < arrBoxen.length; i++) {
		    if(arrBoxen[i].checked == true) {
				res=false;
			} 		
	}

	if (res) {
		alert('Bitte Wählen Sie mindestens ein Thema aus!');
		return false;
	}	
*/

	
	
	if (window.document.newsletter.accept.checked == false )
	  {
		alert('Please comfirm yes, I would like to receive plettac`s newsletter!');
		return false;
	  } 	  
}