Undefined variable, class, or package name

The following code in the jsp is supposed to display the correct 'Securities' link based on the app_main_frames URL. I am getting an error. Can anyone help?
<% if (parent.app_main_frame.location == ("http://ccmsun57.ccminvest.com:8080/cgi-java/Allocation/jsp/scenario.jsp?source=init")) { %>
Securities
<% } else { %>
<a href="/cgi-java/Holdings/jsp/SecurityInventoryQuery.jsp?which_search=none&which_category=none
target="app_main_frame">Securities</a>
<% } %>
I am getting the following error:
Generated servlet error:
/opt/JBoss-2.4.4_Tomcat-4.0.1/catalina/work/localhost/cgi-java/common/jsp/NavigationMenu$jsp.java:173:
Undefined variable, class, or package name: parent
if (parent.app_main_frame.location ==
^
("http://ccmsun57.ccminvest.com:8080/cgi-java/Allocation/jsp/scenario.jsp?source=init")) {

If app_main_frame is a frame in a frameset then you cannot
simply refer to it in a Java scriptlet.
You can refer to it in a JavaScript script, like this:
<script>
if (parent.app_main_frame.location == "http://ccmsun57.ccminvest.com:8080/cgi-java/Allocation/jsp/scenario.jsp?source=init")
document.write("<a href=\"javascript:submit_Form('none')\"target=\"app_main_frame\">Securities</a>");
else
document.write("<a href=\"/cgi-java/Holdings/jsp/SecurityInventoryQuery.jsp?which_search=none&which_category=none\"target=\"app_main_frame">Securities</a>");
</script>

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Message was edited by:
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