In Debian Squeeze Aptana Studi Version 2 works fine….but when we try install jquery support from install Aptana feature it often fails to install…
This method fails in the midst of installation…So after searching i found one way..
1)Download plugin by clicking this: com.jquery.1.5_1.5.jar
2) Copy file com.jquery.1.5_1.5.jar to directory ~/Aptana Studio 2.0/dropins
3) Start Aptana 2.0 and enable the code assist as shown in the following picture.
You can get this by going to Window > Preferences
Select it and apply ok.Now you will get jquery support in your codes.