function chkFormular()
{
if(document.Form5.miet.value <7)
{
alert("rent minimum 7 days and 2 adults!");
  document.Form5.zahl5.value="0";
document.Form5.abreise.focus();
 return false;
}
if(document.Form5.stell.value <1)
{
alert("Please enter only 1 camping spot or 1 rent!");
  document.Form5.zahl5.value="0";
  return false;
}
if(document.Form5.stell.value >=2)
{
alert("Please enter only 1 camping spot or 1 rent!");
  document.Form5.zahl5.value="0";
 return false;
}
}
function chkformu()
{
if(document.Form5.mind.value < 100)
{
alert("minimum amount of Camping spot 30,00 €, rent 100,00 € !");
document.Form5.barz.focus();
return false;
}
if (document.anzahlen.agb.checked == false )
{
alert('Please confirm AGB to continue.');
return false;
}
}