var ThreeSomeDisplay = new Object();

ThreeSomeDisplay.Settings = {
    ContentHolder : 'content_boxes'
};

ThreeSomeDisplay.ShowBoxes = function(sElementName) {
    
    Selector.findChildElements($(ThreeSomeDisplay.Settings.ContentHolder),
        [ 'div.content_box' ]).each(function(object) {
        object.hide();
    });
    $(sElementName).show();
};