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<!DOCTYPE html> <html> <body> <img src ="planets.gif" width="145" height="126" alt="行星"usemap ="#planetmap"> <map name="planetmap"> <area shape="rect" coords="0,0,82,126" href="sun.htm" alt="太阳"> <area shape="circle" coords="90,58,3" href="mercur.htm" alt="水星"> <area shape="circle" coords="124,58,8" href="venus.htm" alt="金星"> </map> <p> <a href="/html/default.asp">HTML</a><br> <a href="/css/default.asp">CSS</a> </p> <p>单击该按钮可显示文档中每个链接的 URL。</p> <button type="button" onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.links; var txt = ""; var i; for (i = 0; i < x.length; i++) { txt = txt + x[i].href + "<br>"; } document.getElementById("demo").innerHTML = txt; } </script> </body> </html>