Use javascript to control the expansion and hidden code of table rows_javascript skills

<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>Untitled Document</title> <table> <tr onclick="close_open()"> <td>1</td> <td></td> </tr> <tbody id="myTr"> <tr> <td>2</td> <td></td> </tr> <tr> <td>3</td> <td></td> </tr> </tbody> </table>