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源代码：
点击运行
<!DOCTYPE html> <html> <head> <script> function createTHead() { var x=document.getElementById("myTable"); if (!x.tHead) { var header=x.createTHead(); var row=header.insertRow(0); var cell=row.insertCell(0); cell.innerHTML="<b>This is a table header</b>"; } } function deleteTHead() { document.getElementById("myTable").deleteTHead(); } </script> </head> <body> <table id="myTable" border="1"> <tr> <td>cell 1</td> <td>cell 2</td> </tr> <tr> <td>cell 3</td> <td>cell 4</td> </tr> </table> <br> <button type="button" onclick="createTHead()">Create thead</button> <button type="button" onclick="deleteTHead()">Delete thead</button> </body> </html>
运行结果
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