'Not defined' debug error

Question

Hello
Please can someone look at this code and let me know ho to fix it. The code is not mine - I am trying to open up an online course when I get the debug error for the line which is highlighted between asteriks.
Thank you
=====================================
<script language="javascript" src="/dpec/shared/js/site.js"></script>
<script language="javascript" src="/dpec/shared/js/mlclientpage.js"></script>
<script language="javascript" src="/dpec/shared/js/courseware.js"></script>
<script language="javascript" src="/dpec/shared/js/foobar.js"></script>
<script language="javascript">
<!--
var ThisPage = new MlPage;
//this prevents the course frame from being displayed w/in itself:
if (typeof(parent.coursewareHandler) != typeof(notDefined))
myLocation=location.href;
parent.location.href=myLocation;
var skinDir = ThisPage.getPassedParm("sk");
// if (skinDir=="") skinDir="1";
var isDummies=false;
var allowEdit = ThisPage.getPassedParm("ae");
if (allowEdit == "")
allowEdit = "0";
var cid = ThisPage.getPassedParm("cid");
if (cid=="") cid = ThisPage.getPassedParm("course");
if (cid=="") cid==ThisPage.getAcroFromPath();
if (cid=="") cid="de1";
var pg = ThisPage.getPassedParm("pg");
if (pg=="") pg=cid.substring(0,3) + "title";
var fullpg = ThisPage.getPassedParm("fullpg",false);
var pageName = "";
if (fullpg != "")
pageName = unescape(fullpg);
else
pageName = "courses/" + cid + "/" + pg + ".htm";
var inCourse = ThisPage.getPassedParm("incourse");
var referrer = ThisPage.getPassedParm("referrer");
if (referrer != "") referrer = unescape(referrer);
// embed the acro.js file in the course directory
if (ThisPage.crsMode != "mlie" && cid != "de1") includeCourseJs(cid)
var coursewareHandler = null;
var foobar = null;
// var logoGif = ThisPage.getPassedParm("logo");
// logoGif="/dpec/custom/logos/logo1.gif";
// Add customnotes.js for D-Note
if (isMindLeaders==false) document.write("<script language=\"javascript\" src=\"/dpec/custom/notes/host/custom_notes.js\"></scr" + "ipt>");
function onLoad()
var instantMentorClassKey = unescape(ThisPage.getPassedParm("imclskey"));
if (instantMentorClassKey == "")
instantMentorClassKey = null;
// reset the skinDir after acro.js has been loaded above
skinDir=ThisPage.getSkinDir();
if (skinDir=="dummies")
isDummies=true;
logoGif=sharedDirectory + "images/skins/" + skinDir + "/images/dummies_logo.gif";
// foobarLogo="<img src='/dpec/shared/images/skins/4/buttons/logo.gif' width=27 height=27 align=top>";
// document.write ("<script language=\"javascript\" src=\"/dpec/custom/notes/dummies/dummies.js\"></scr" +"ipt>");
foobar = new Foobar();
foobar.allowEdit = (allowEdit == "1");
**** coursewareHandler = new CoursewareHandler(foobar,window);****
coursewareHandler.inCourse = (inCourse == "0" ? false : true);
coursewareHandler.referrer = referrer;
coursewareHandler.instantMentorClassKey = instantMentorClassKey;
frames[0].name = "course_window";
frames[0].location.replace(pageName);
frames[1].location.replace("footer_bar.htm");
if (ThisPage.getLmsObject() != null)
ThisPage.getLmsObject().coursewareHandler = coursewareHandler;
function includeCourseJs()
var jsName=getCoursesDirectory(cid) + cid + "/"+ cid + ".js";
var js="<SCRIPT Language=\"Javascript\" SRC=\"" + jsName + "\"></S" + "CRIPT>";
document.write(js);
function getStylesheetHtml()
return ThisPage.getCourseStylesheetHtml(skinDir);
//-->
</script>
<script language="javascript" src="/dpec/shared/js/detect_flash.js"></script>
<frameset rows="*,36" frameborder="no" onload="onLoad()" framespacing=0 border=0>
<frame src="/dpec/loadmsg.htm" border=0></frame>
<frame name="foobar" src="/dpec/blank.htm" scrolling=no marginwidth=0 marginheight=0 framespacing=0 noresize border=0></frame>
</frameset>

Answer 1

Well i haven't examine the code but try something like
and see what happens. Then try to figure out what window sould be (probably not null)
var window=null; // <---------------------------------
var coursewareHandler = null;
var foobar = null;
// var logoGif = ThisPage.getPassedParm("logo");
// logoGif="/dpec/custom/logos/logo1.gif";
// Add customnotes.js for D-Note
if (isMindLeaders==false) document.write("<script language=\"javascript\" src=\"/dpec/custom/notes/host/custom_notes.js\"></scr" + "ipt>");
function onLoad()
var instantMentorClassKey = unescape(ThisPage.getPassedParm("imclskey"));
if (instantMentorClassKey == "")
instantMentorClassKey = null;
// reset the skinDir after acro.js has been loaded above
skinDir=ThisPage.getSkinDir();
if (skinDir=="dummies")
isDummies=true;
logoGif=sharedDirectory + "images/skins/" + skinDir + "/images/dummies_logo.gif";
// foobarLogo="<img src='/dpec/shared/images/skins/4/buttons/logo.gif' width=27 height=27 align=top>";
// document.write ("<script language=\"javascript\" src=\"/dpec/custom/notes/dummies/dummies.js\"></scr" +"ipt>");
foobar = new Foobar();
foobar.allowEdit = (allowEdit == "1");
**** coursewareHandler = new CoursewareHandler(foobar,window);****