location not working to load new CSP page

I have a web application and one of the CSP pages contains the following snippets:

<script language='javascript'>
function SubmitForm(pid,sid) {
//code to process form

alert ("study saved");

self.document.location="newpage.csp";

}

</script>

<form name="Studyform"  method="post" onsubmit='return SubmitForm(#(SubjObj.%Id())#,#(StudyObj.%Id())#);' >
<!-- form contents -->

</form>

The form is correctly processed, the object is saved, and the alert appears, but the new page does not get loaded and I cannot figure out why.

Any suggestions?