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onpropertypchange,您可以先修改部分代码再运行.
<html> <head> <script language="javascript"> function changeBox(status) { textbox.style.display = status ? "" : "none" } </script> <script language="javascript" for="test" event="onpropertychange"> var propName = event.propertyName var propValue = this[propName] switch(propName) { case "checked": changeBox(propValue) break; } </script> </head> <body> <input type="radio" id="test" name="radio" checked="true" /> <input type="radio" name="radio" /> <input id="textbox" /> </body> </html>