编辑下面的代码:【加编码】
<html> <head> <script> function displayResult() { var x=document.getElementById("myTable"); var th=x.getElementsByTagName("th"); for (var i=0;i<th.length;i++) { alert ("The " + (i+1) + ". column axis is: " + th[i].axis); } } </script> </head> <body> <table border="1" id="myTable"> <tr> <th axis="car">Name</th> <th axis="country">Country</th> </tr> <tr> <td>BMW</td> <td>Germany</td> </tr> <tr> <td>Volvo</td> <td>Sweden</td> </tr> <tr> <td>Saab</td> <td>Sweden</td> </tr> </table> <br> <button type="button" onclick="displayResult()">Get Axis</button> </body> </html>
结果: 【此窗口】 帮助?
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