function checker()
{
  if (document.calculation.Name.value == "") {
    alert("Geben Sie bitte Ihren Namen an!");
    document.calculation.Name.focus();
    return false;
  }
  if (document.calculation.Strasse.value == "") {
    alert("Geben Sie bitte Ihre Adresse an!");
    document.calculation.Strasse.focus();
    return false;
  }
  if (document.calculation.PLZ_Ort.value == "") {
    alert("PLZ und Ort angeben!");
    document.calculation.PLZ_Ort.focus();
    return false;
  }
  if (document.calculation.eMail.value == "") {
    alert("E-Mail Adresse fehlt!");
    document.calculation.eMail.focus();
    return false;
  }
  if(document.calculation.eMail.value.indexOf('@') == -1) {
       alert("Keine gültige E-Mail-Adresse!");
       document.calculation.eMail.focus();
       return false;
  }
 }


function addi(){
   var Wert1 = document.calculation.Club_LE.value * 1;
   var Wert3 = document.calculation.Outlet_ABG.value * 1;
   var Wert4 = document.calculation.Outlet_BLK.value * 1;
   var Wert5 = document.calculation.Outlet_Halle.value * 1;
   var Wert6 = document.calculation.Outlet_LEsm.value * 1;
   var Wert7 = document.calculation.Outlet_ML.value * 1;
   var Wert8 = document.calculation.Outlet_MTL.value * 1;
   var Wert9 = document.calculation.Outlet_DZ.value * 1;
   var Wert10 = document.calculation.Club_saalrul.value * 1;
   var Wert11 = document.calculation.Outlet_LEbig.value * 1;
   var Wert12 = document.calculation.Outlet_Chemnitz.value * 1;
   var Wert13 = document.calculation.Outlet_Dresden.value * 1;
   var Wert14 = document.calculation.Outlet_DDumland.value * 1;
   var Wert15 = document.calculation.Outlet_msax.value * 1;
   var Wert16 = document.calculation.Outlet_Zwickau.value * 1;
   var Wert17 = document.calculation.Outlet_Plauen_Vogtland.value * 1;
   var Wert18 = document.calculation.Outlet_Jena_Weimar_Erfurt.value * 1;
   var Wert21 = document.calculation.Outlet_Suedthueringen.value * 1;
   var Wert22 = document.calculation.Outlet_Magdeburg.value * 1;
   var Wert23 = document.calculation.Outlet_MDumland.value * 1;
   var Wert25 = document.calculation.Outlet_Potsdam.value * 1;
   var Wert26 = document.calculation.Outlet_Gera.value * 1;
   var Wert29 = document.calculation.Hand2Hand_LEexclusiv.value * 1;
   var Wert30 = document.calculation.Hand2Hand_LE.value * 1;
   var Wert31 = document.calculation.Hand2Hand_Dresden_exclusiv.value * 1;
   var Wert32 = document.calculation.Hand2Hand_Dresden.value * 1;
   var Wert33 = document.calculation.Outlet_Halle2.value * 1;
   var Wert34 = document.calculation.Outlet_ostsax.value * 1;
   var Wert35 = document.calculation.Outlet_LE_Sueden.value * 1;
   var Wert36 = document.calculation.Outlet_Zwickau_Umland.value *1;
      
   y = Wert1 + Wert3 + Wert4 + Wert5 + Wert6 + Wert7 + Wert8 + Wert9 + Wert10 + Wert10 + Wert11 + Wert12 + Wert13 + Wert14 + Wert15 + Wert16 + Wert17 + Wert18 + Wert21 + Wert22 + Wert23 + Wert25 + Wert26 + Wert29 + Wert30 + Wert31 + Wert32 + Wert33 + Wert34 + Wert35 + Wert36;
   
   y=(y==0)?"0.00":String(parseInt(y*100+Math.abs(y)/y*0.5)/100);
   if(y.length-y.lastIndexOf(".")-1==1)y+="0";
   if(y.length-y.lastIndexOf(".")-1==y.length)y+=".00";
   document.calculation.Summe.value = y;
   //document.calculation.mwst.value = Math.round((document.calculation.summe.value*0.16)*100)/100;
   z = Math.round((document.calculation.Summe.value*0.19)*100)/100;
   z=(z==0)?"0.00":String(parseInt(z*100+Math.abs(z)/z*0.5)/100);
   if(z.length-z.lastIndexOf(".")-1==1)z+="0";
   if(z.length-z.lastIndexOf(".")-1==z.length)z+=".00";
   document.calculation.MwSt.value = z;
   //document.calculation.brutto.value = Math.round((document.calculation.summe.value*1.16)*100)/100;
   x = Math.round((document.calculation.Summe.value*1.19)*100)/100;
   x=(x==0)?"0.00":String(parseInt(x*100+Math.abs(x)/x*0.5)/100);
   if(x.length-x.lastIndexOf(".")-1==1)x+="0";
   if(x.length-x.lastIndexOf(".")-1==x.length)x+=".00";
   document.calculation.Bruttosumme.value = x;
 }