Log in form Help

Hello,

I really need help in Login form I am using the one column module in my site .... but the problem is as per my design I have login lable and the user name pass word field...I do not have the login button...so I have set the the login button display none from the css .... but when I have done this I am only able to login using FF and in other browser I am not able to log in ..... Am I make any mistake in Login Module....?

Thanks in Advance!
KK!