Equalheights working fine in jquery 1.3.2 but not working in JQuery 1.4.

Hi,
Attached the code is working fine in jquery1.3.2 but not working in jquery1.4. it is giving following error

Error: a.ownerDocument is null
Source File : file:///C:/....../jquery-1.4.2.js
Line: 117

Please help out

Note: Please browse the attached file in firefox only

Thanks,