
<!--
function validateNumKey ()
{
 var inputKey =  event.keyCode;
 var returnCode = true;
 
 if ( (inputKey > 47 && inputKey < 58) || inputKey == 46) // numbers
 {
  return;
 }
 else
 {
  alert("U kunt hier geen letters invullen, alleen cijfers en punten.");
  returnCode = false;
  event.keyCode = 0;
 }
 event.returnValue = returnCode;
}
-->