Кнопки
<div style="height:40px">
<div id="ans_otv" style="weidth:40px; overflow: hidden; float:left" >
<div align="left"><button onclick="answer_1">1
</button></div>
<div align="left"><button onclick="answer_2">2
</button></div>
<button onclick="answer_3">3
</button>
</div>
</div>
</body>
</html>