I have a stylesheet for each browser, like Internet explorer. But on IE when i fill the login form and submit, some of the styling is missing and i don't know why this happen. When a user is autenticated , two more <li> elements are appear at top navigation, but they are already "stylized" by the stylesheet before. And if i refresh that page, all the elements are as they are supposed to be.
I found my own solution. If u have all the fields treated on css but still getting problems on submit a login form for example, especially on internet explorer, u just need to do an automatic refresh. I found this code on a search, and u just need to call the function whatever u need it.