Genki.tools.updateJSON();"></textarea>
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        <ul id="study-tool-settings" class="clear">
          <li><a id="downloadCode" class="button" title="Save custom exercise" download="Custom Vocabulary Exercise"><span class="en">Save</span><span class="ja">セーブする</span></a></li>
          <li><button id="loadCode" class="button" title="Load custom exercise" onclick="this.nextSibling.click();"><span class="en">Load</span><span class="ja">ロードする</span></button><input id="