Hi Tony,
Thank you for your attention and apologize for my english.
I create a link to test (ccs with absolute)http://www.faxinfo.com.br/JQGRID/TESTE.ASP
and css with relative
http://www.faxinfo.com.br/JQGRID/TESTE_relative.ASP
In FF it's all right. Only with IE (6 & 7) has problem (no javascript error is show). To certify that Modal and css are loading i try change background-colors, and… change.