function berechnen()
{
voben=document.getElementById("oben").value;
vunten=document.getElementById("unten").value;
diff=voben-vunten;
voben=voben.replace(",",".");
vunten=vunten.replace(",",".");
vumfang=vunten/5;
vumfang=Math.round(vumfang);
vumfang*=5;
var zahl;

lg=new Array(5);

lg[0]=new Array(65,70,75,80,85,90,95,100,105,110);
lg[1]=new Array(30,32,34,36,38,40,42,44,46,48);
lg[2]=new Array(80,85,90,95,100,105,110,115,120,125);
lg[3]=new Array(65,70,75,80,85,90,95,100,105,110);
lg[4]=new Array(8,10,12,14,16,18,20,22,24,26);

for(i=0;i<10;i++)
{
	if(vumfang==lg[0][i])
         	zahl=i;
}
for(i=0;i<5;i++)
	document.getElementById(i).value=lg[i][zahl];



if(diff<=0)
{
alert("Die Oberbrustweite muss groesser als die Unterbrustweite sein!");
return false;
}
if(diff<=12.5)
	vcup="A";
else if(diff<=15)
	vcup="B";
else if(diff<=17.5)
	vcup="C";
else if(diff<=20)
	vcup="D";
else if(diff<=22.5)
	vcup="E/DD";
else if(diff<=25)
	vcup="F/EE/DDD";
else if(diff<=27.5)
	vcup="G/FF/EEE";
else if(diff<=30)
	vcup="H";
else if(diff<=32.5)
	vcup="HH";
else if(diff<=35)
	vcup="II/J";
else
	vcup="JJ";
document.getElementById("cup").value=vcup;
}