childNodes 用法两例_javascript技巧

第一：

<title> New Document </title> <meta name="Generator" content="EditPlus"> <meta name="Author" content=""> <meta name="Keywords" content=""> <meta name="Description" content=""> <script language="JavaScript"> <!-- var row = -1; function showEdit(obj){ var cell2 = obj.parentNode.parentNode.childNodes[1]; var rowIndex = obj.parentNode.parentNode.rowIndex; cell2.innerHTML = "<input type='text' value='"+ cell2.innerHTML +"'>"; if(row != -1){ var oldCell2 = document.getElementById("tb").rows[row].cells[1]; oldCell2.innerHTML = oldCell2.childNodes[0].value; } row = rowIndex; } //--> </script> <table id="tb"> <tr> <td><input type="radio" onclick="showEdit(this)" name="rad"></td> <td></td> <td></td> </tr> <tr> <td><input type="radio" onclick="showEdit(this)" name="rad"></td> <td></td> <td></td> </tr> <tr> <td><input type="radio" onclick="showEdit(this)" name="rad"></td> <td></td> <td></td> </tr> </table>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]

第二：

<table border="1" width="100%"> <tr> <td><input name="m" type="checkbox" onclick="mm(this)"></td> <td>1111</td> <td><input name="aaa" value="222" disabled></td> <td><input name="bbb" value="333" disabled></td> </tr> <tr> <td><input name="m" type="checkbox" onclick="mm(this)"></td> <td>1111</td> <td><input name="aaa" value="222" disabled></td> <td><input name="bbb" value="333" disabled></td> </tr> <tr> <td><input name="m" type="checkbox" onclick="mm(this)"></td> <td>1111</td> <td><input name="aaa" value="222" disabled></td> <td><input name="bbb" value="333" disabled></td> </tr> </table> <script language="JavaScript"> function mm(e) { var currentTr=e.parentElement.parentElement; var inputObjs=currentTr.getElementsByTagName("input"); for(var i=0;i<inputObjs.length;i++) { if(inputObjs[i]==e) continue; inputObjs[i].disabled=!e.checked; } } </script>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]