Following commented lines are marked as errors in Nb60. In Nb61 is much better - no errors are reported, 
but .width and .height are underlined in red. Copy script below into empty JSP page to test it.

<script type="text/javascript">
    //dojo.widget.byId('mainPanel').resizeTo(
    //    dojo.html.getMarginBox(dojo.byId('tabIdx<%= session.getAttribute("anything") %>')).width,
    //    dojo.html.getMarginBox(dojo.byId('tabIdx<%= session.getAttribute("anything") %>')).height
    //);
</script>

My Nb60 version (with patches): 
Product Version: NetBeans IDE 6.0 (Build 200711261600)
Java: 1.6.0_04; Java HotSpot(TM) Client VM 10.0-b19
System: Windows XP version 5.1 running on x86; Cp1250; pl_PL (nb)
Userdir: C:\Documents and Settings\robert\.netbeans\6.0

My Nb61 version:
Product Version: NetBeans IDE Dev (Build 200804020004)
Java: 1.6.0_04; Java HotSpot(TM) Client VM 10.0-b19
System: Windows XP version 5.1 running on x86; Cp1250; pl_PL (nb)
Userdir: C:\Documents and Settings\robert\.netbeans\dev