标签导航：

如何在javascript中搜索图像映射区域的替代文本？

要在JavaScript中搜索图像映射区域的替代文本（alt），请使用 alt 属性。您可以尝试运行以下代码以获取替代文本。

示例

<!DOCTYPE html>
<html>
   <body>
      <img src = "/images/html.gif" alt = "HTML Map" border = "0" usemap = "#html"/>
     
      <map name = "html">
         <area id = "myarea" shape = "circle" coords = "154,150,59" href = "about.htm?id=company" alt = "Team" target = "_self" >
      </map>
      <script>
         var x = document.getElementById("myarea").alt;
         document.write("<br>Alternate Text: "+x);
      </script>
   </body>
</html>