地图区域标题未在悬停时显示

Question

我无法在悬停时显示地图区域标题

<p style="text-align: center;">&nbsp;<a href="img"><img src="img"  usemap="#exhib" id="imgmap201293016112" alt="" />
<map name="exhib">
 <area shape="circle"  coords="670,350, 20" href="" alt="imgmap201293016112-0" title="company1" class="imgmap201293016112-area" id="imgmap201293016112-area-0" /></map>
<p><img src="img_other" alt="" /></p>
</div>
</a></p>

这是图像

enter image description here