Tim,

 

Please try the following steps:

 

1. <form name="theForm" ... onsubmit="return addTopic()">

 

2.  <script language="Javascript">
      function addTopic() 
     { 
        var frm = document.forms.theForm; 
        frm.action = 'javascript:void(0)';  //stay here unless all checks are passed
        if(!frm.TitleField.value) 
        { 
            alert("Please add a SUBJECT"); 
            frm.TitleField.focus(); 
        } 
        else 
        { 
            frm.action = 'target.asp'; 
            save(Editor1); 
        } 
    }