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JS 参考手册
Object width 属性
tryjsref_object_width2
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<!DOCTYPE html> <html> <body> <object id="myObject" width="250" height="200" data="helloworld.swf"></object> <p>Click the button to display the width of the object element.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myObject").width; document.getElementById("demo").innerHTML = x; } </script> </body> </html>