function toggleElement(eId, forceDisplay, displayType) {
    var el = $get(eId);
    if (el != null) {
        if (forceDisplay == null) forceDisplay = false;
        if (displayType == null) displayType = 'block';
        el.style.display = (el.style.display != 'none' && !forceDisplay) ? 'none' : displayType;
    }
}

/*** Share Video ***/
function hideElementArray(preId, num) {
    for (var i = 1; i <= num; i++) {
        var el = $get(preId + i);
        if (el != null) el.style.display = 'none';
    }
}