code assist problem with java script

hi
I am having some issues with code assist in java script
here is the script i have

var obj = document.getElementById("soptable");
obj.style.visibility='visible';

In this code when i type obj and then dot and try to get code assist using control + space bar
I get “Conent Assist Not Available at the current location”

Is it possible to get code assist in this situation or not

Here is my system configuration

*** Date: Tue Apr 11 09:06:23 EDT 2006

*** System properties:
OS=WindowsXP
OS version=5.1
Java version=1.4.2_06

*** MyEclipse details:
MyEclipse Enterprise Workbench

Version: 4.1.1 GA
Build id: 20060309-4.1.1-GA

*** Eclipse details:
Eclipse SDK

Version: 3.1.2
Build id: M20060118-1600

Eclipse Platform

Version: 3.1.2
Build id: M20060118-1600

Eclipse RCP

Version: 3.1.2
Build id: M20060118-1600

Eclipse Java Development Tools

Version: 3.1.2
Build id: M20060118-1600

Eclipse Plug-in Development Environment

Version: 3.1.2
Build id: M20060118-1600

Eclipse Project SDK

Version: 3.1.2
Build id: M20060118-1600

Eclipse startup command=-os
win32
-ws
win32
-arch
x86
-launcher
C:\eclipse3.1.2new\eclipse\eclipse.exe
-name
Eclipse
-showsplash
600
-exitdata
a38_88
-vm
C:\WINDOWS\system32\javaw.exe