Remove Iframe Border in IE

when we are using Iframe then  Iframe border are showing in IE not in Firefox,for resolve this we have to set FrameBorder=0.

<iframe src="../navigation.aspx" style="margin-bottom: 0px; height: 34px; width: 90%;
                        margin-top: 0px; padding-bottom: 0;" scrolling="no" frameBorder="0" ></iframe>