hover</option>
        <option><img src="theme:toolbar-split-dd-button-normal">theme:toolbar-split-dd-button-normal</option>
        <option><img src="theme:toolbar-split-dd-button-hover">theme:toolbar-split-dd-button-hover</option>
        <option><img src="theme:toolbar-split-dd-button-disabled">theme:toolbar-split-dd-button-disabled</option>
        <option><img src="theme:toolbar-split-dd-button-checked">theme:toolbar-split-dd-button-checked</option>
        <option><img src="theme:toolbar-split-dd-butt