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Area coords 属性
tryjsref_area_coords2
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<!DOCTYPE html> <html> <body> <img src="/demo/images/planets.gif" width="145" height="126" usemap="#planetmap"> <map name="planetmap"> <area id="venus" shape="circle" coords="124,58,8" alt="Venus" href="/demo/venus.htm"> </map> <p id="demo">The coordinates 124,58,8 specifies the planet on the right side (venus) to be clickable.<br><br> Click the button to change the coordinates for the "venus" area in the image-map.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { document.getElementById("venus").coords = "90,58,3"; document.getElementById("demo").innerHTML = "The coordinate values of ''venus'' was changed from ''124,58,8'' to ''90,58,3''." + "<br>" + "The clickable area has been moved from the planet on the right side (venus) to the planet in the middle."; } </script> </body> </html>