下面的例子将更改图像的替代文本:
</>code
- <html>
- <head>
- <script type="text/javascript">
- function changeAlt()
- {
document.getElementById("compman").alt="Man using computer"
- }
- function alertAlt()
- {
- alert(
document.getElementById("compman").alt
)- }
- </script>
- </head>
- <body>
- <img id="compman" src="compman.gif" alt="Computerman" />
- <br />
- <input type="button" onclick="changeAlt()"
- value="Change alt text">
- <br /><br />
- <input type="button" onclick="alertAlt()"
- value="Alert alt text">
- </body>
- </html>
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