Need help understanding program's CSS

[sonicx2218]

I'm using the app mediabox which lets me create iframe lightboxes. I don't want horizontal scroll on the iframe, just vertical. The issue is I have NO idea how to add a new class in the CSS of the program to achieve this. Here is the css.

#mbOverlay {
    position: fixed;
    z-index: 9998;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    cursor: pointer;
}

        /*  Legacy fix for older browsers   */

#mbOverlay.mbOverlayFF {
    background: transparent url(/images/80.png) repeat;
}

#mbOverlay.mbOverlayIE {
    position: absolute;
}

        /*  Overlay panel styling   */

#mbCenter {
    position: absolute;
    z-index: 9999;
    left: 50%;
    background-color: #000;
    -webkit-border-radius: 10px;
    -khtml-border-radius: 10px;
    -moz-border-radius: 10px;
    border-radius: 10px;
    -webkit-box-shadow: 0px 5px 20px rgba(0,0,0,0.50);
    -khtml-box-shadow: 0px 5px 20px rgba(0,0,0,0.50);
    -moz-box-shadow: 0px 5px 20px rgba(0,0,0,0.50);
    box-shadow: 0px 5px 20px rgba(0,0,0,0.50);
    /* For IE 8 */
    -ms-filter: "progid:DXImageTransform.Microsoft.Shadow(Strength=5, Direction=180, Color='#000000')";
    /* For IE 5.5 - 7 */
    filter: progid:DXImageTransform.Microsoft.Shadow(Strength=5, Direction=180, Color='#000000');
}

#mbCenter.mbLoading {
    background: #000 url(/images/loading.gif) no-repeat center;
        /*  This style is applied only during animation.    */
        /*  For example, the next lines turn off shadows    */
        /*  improving browser performance on slow systems.  */
        /*  To leave shadows on, just remove the following: */
    -webkit-box-shadow: none;
    -khtml-box-shadow: none;
    -moz-box-shadow: none;
    box-shadow: none;
}

#mbImage {
    overflow: hidden;
    position: relative;
    left: 0;
    top: 0;

        /*  Inline content styling  */

    font-family: Myriad, Verdana, Arial, Helvetica, sans-serif;
    line-height: 20px;
    font-size: 12px;
    color: #fff;
    text-align: left;
    background-position: center center;
    background-repeat: no-repeat;
    padding: 10px;
}

        /*  Title, Caption and Button styling   */

#mbBottom {
    min-height: 20px;
    font-family: Myriad, Verdana, Arial, Helvetica, sans-serif;
    line-height: 20px;
    font-size: 12px;
    color: #999;
    text-align: left;
    padding: 0 10px 10px;
}

#mbTitle, #mbPrevLink, #mbNextLink, #mbCloseLink {
    display: inline;
    color: #fff;
    font-weight: bold;
    line-height: 20px;
    font-size: 12px;
}

#mbNumber {
    display: inline;
    color: #999;
    line-height: 14px;
    font-size: 10px;
    margin: auto 10px;
}

#mbCaption {
    display: block;
    color: #999;
    line-height: 14px;
    font-size: 10px;
}

#mbPrevLink, #mbNextLink, #mbCloseLink {
    float: right;
    outline: none;
    margin: 0 0 0 10px;
    font-weight: normal;
}

#mbPrevLink b, #mbNextLink b, #mbCloseLink b {
    color: #eee;
    font-weight: bold;
    text-decoration: underline;
}

#mbPrevLink big, #mbNextLink big, #mbCloseLink big {
    color: #eee;
    font-size: 16px;
    line-height: 14px;
    font-weight: bold;
}

#mbBottom a, #mbBottom a:link, #mbBottom a:visited {    /* Thanks to Danny Jung for feedback and corrections */
    text-decoration: none;
    color: #ddd;
}

#mbBottom a:hover, #mbBottom a:active {
    text-decoration: underline;
    color: #fff;
}


        /*  Error message styling   */

#mbError {
    position: relative;
    font-family: Myriad, Verdana, Arial, Helvetica, sans-serif;
    line-height: 20px;
    font-size: 12px;
    color: #fff;
    text-align: center;
    border: 10px solid #700;
    padding: 10px 10px 10px;
    margin: 20px;
    -webkit-border-radius: 5px;
    -khtml-border-radius: 5px;
    -moz-border-radius: 5px;
    border-radius: 5px;
}

#mbError a, #mbError a:link, #mbError a:visited, #mbError a:hover, #mbError a:active {
    color: #d00;
    font-weight: bold;
    text-decoration: underline;
}

Any chance you guys can understand this and know how to achieve this?

[almostbob]

in the code that displays the iframe, what class is the iframe, how is the iframe define

[sonicx2218]

mediaType = 'url';
                mediaWidth = mediaWidth || "640px";
                mediaHeight = mediaHeight || "360px";
                mediaId = "mediaId_"+new Date().getTime();
                preload = new Element('iframe', {
                    'src': URL,
                     'id': mediaId,
                     width: mediaWidth,
                     height: mediaHeight,
                     'frameborder': 0
                    });
                startEffect();
            }

This is really all I have to go on. In the code earlier on, it states that the content is injected into #center.

[sonicx2218]

I apologize. I found the answer and it was in JS