function prepaid()
	{
		
	
	produkt_s     = document.getElementById("produkt_s").value;
	
	if (produkt_s=='pp_teamspeak3')
	{
	slots   = document.getElementById("slots").value;
	duration    = document.getElementById("duration").value;
	
	slots = slots * 1;
	duration = duration * 1;
	
	multiplikator = 1;
	
	if (duration==2880)  {  multiplikator=2; }
	if (duration==10080)  {  multiplikator=7; }
	if (duration==43200)  {  multiplikator=30; }
    	
	gesamt_slots = slots * multiplikator;
	epreis = gesamt_slots * 0.01;
	
	stunden = duration / 60;
	
	spreis = stunden * 0.01;
	
	summe_s = spreis + epreis;
	

	document.getElementById("endpreis_s").value = summe_s.toFixed(2) + " Euro" ;

	document.getElementById("summe_s").value = summe_s.toFixed(2);
	}
	
	
	}