@font-face {
 font-family: OpenSans;
 src: url("OpenSans-Light.eot") /* EOT file for IE */
}
@font-face {
 font-family: OpenSans;
 src: url("OpenSans-Light.ttf") /* TTF file for CSS3 browsers */
}

@font-face {
 font-family: OpenSans_B;
 src: url("OpenSans-Bold.eot") /* EOT file for IE */
}
@font-face {
 font-family: OpenSans_B;
 src: url("OpenSans-Bold.ttf") /* TTF file for CSS3 browsers */
}

@font-face {
 font-family: OpenSans_XB;
 src: url("OpenSans-ExtraBold.eot") /* EOT file for IE */
}
@font-face {
 font-family: OpenSans_XB;
 src: url("OpenSans-ExtraBold.ttf") /* TTF file for CSS3 browsers */
}