The jar fie is available from http://lookang.wikispaces.com/file/detail/ejs_users_sgeducation_lookang_Momentum1D2010web.jar
However, the above URL is a web page content which show the download link.


You can find out the actual URL from the above web page:
http://lookang.wikispaces.com/file/view/ejs_users_sgeducation_lookang_Momentum1D2010web.jar/126986537/ejs_users_sgeducation_lookang_Momentum1D2010web.jar
Separate the above URL into [b]path[/b] and [b]file[/b] part
path=http://lookang.wikispaces.com/file/view/ejs_users_sgeducation_lookang_Momentum1D2010web.jar/126986537/
file=ejs_users_sgeducation_lookang_Momentum1D2010web.jar
Then, the code base and archive tags for applet code should be
[code]
codebase="path" archive="file"
[/code]
The [b]name[/b] and [b]id[/b] tags should be unique at the same page (if you have more than one applets , each name and id should be unique).
So the complete applet code to show the applet might be
[code]
<applet archive="ejs_users_sgeducation_lookang_Momentum1D2010web.jar" code="users.sgeducation.lookang.Momentum1D2010web_pkg.Momentum1D2010webApplet.class" codebase="http://lookang.wikispaces.com/file/view/ejs_users_sgeducation_lookang_Momentum1D2010web.jar/126986537/" height="600" id="Momentum1D2010web3151" name="Momentum1D2010web3151" width="900"></applet>
[/code]

The following is the result of the above code