@font-face {
    font-family: 'open_sans';
    src: url('OpenSans-Regular-webfont.woff') format('woff'),
         url('OpenSans-Regular-webfont.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}
@font-face {
    font-family: 'open_sans';
    src: url('OpenSans-Italic-webfont.woff') format('woff'),
         url('OpenSans-Italic-webfont.ttf') format('truetype');
    font-weight: normal;
    font-style: italic;
}
@font-face {
    font-family: 'open_sans';
    src: url('OpenSans-Bold-webfont.woff') format('woff'),
         url('OpenSans-Bold-webfont.ttf') format('truetype');
    font-weight: bold;
    font-style: normal;
}