function checkPcs(id) {
  var menge = id+"_menge";
  if(document.getElementById(id).checked == true) {
    document.getElementById(menge).disabled = false;
  } else {
    document.getElementById(menge).disabled = true;
    document.getElementById(menge).value = "";
  }
}

function checkMenge(id,minmenge) {
  	var menge = id+"_menge";
	if (document.getElementById(menge).value < minmenge){
		alert("Bitte beachten Sie die Mindestbestellmenge");
		return;
	}
	document.form1.submit();
}