var st = new Test();
st.run({
  onStart: function() {
  }
  ,onEnd: function(sd) {
 	  alert('complete');
  }
});

// return false;

onEnd: function(sd) {
 	  alert('complete');
  return true;
}

<SCRIPT LANGUAGE="JavaScript">
<!--
function vform() 
{  
  if (document.form.NAME.value=="")
  { 
		alert('Namensfeld ist leer!'); 
		return false; 
	}
  if (document.form.DESCRIPTION.value=="")
  { 
		alert('Beschreibung ist leer'); 
		return false; 
	}

	return true;
}

// -->
</script>

<form name="form" method="post" action="" onSubmit="return vform(this.form)">
<font class="stn"><b>Name:</b><br>
<input type="text" size=40 name="NAME"><br>
<font class="stn"><b>Beschreibung:</b><br>
<TEXTAREA NAME="DESCRIPTION" ROWS=4 COLS=40 wrap=virtual></TEXTAREA><br>
<input type="submit" name="submit" value="Senden"> <input type="reset" value="Reset"></form>