如何找到我刚刚在JavaScript中单击的行

Question

I can't find the appropriate answer of my problem. I have rows in a table and every row contain one button. How to find the row index of button I just clicked.

<tr>
    <td>111</td>
    <td>aaa</td>
    <td><input type="submit" name="first" id="first" value="First" onclick="countRow(this.id)" /></td>
  </tr>
  <tr>
    <td>222</td>
    <td>bbb</td>
    <td><input type="submit" name="sec" id="second" value="Second" onclick="countRow(this.id)" /></td>
  </tr>
  <tr>
    <td>333</td>
    <td>ccc</td>
    <td><input type="submit" name="third" id="third" value="Third" onclick="countRow(this.id)" /></td>
  </tr>

Answer 1

Use tbody tag and this javascript

 function countRow(id) { var table = document.getElementById('dataTable') var tbody = table.getElementsByTagName('tbody')[0] var rows = tbody.getElementsByTagName('tr'); for (i = 0; i < rows.length; i++) { rows[i].onclick = function() { alert(this.rowIndex + 1); } } } 

 <table id="dataTable"> <tbody> <tr> <td>111</td> <td>aaa</td> <td> <input type="submit" name="first" id="first" value="First" onclick="countRow(this.id)" /> </td> </tr> <tr> <td>222</td> <td>bbb</td> <td> <input type="submit" name="sec" id="second" value="Second" onclick="countRow(this.id)" /> </td> </tr> <tr> <td>333</td> <td>ccc</td> <td> <input type="submit" name="third" id="third" value="Third" onclick="countRow(this.id)" /> </td> </tr> </tbody> </table> 

Answer 2

Use indexOf prototype of array if we cast nodeList to array.

Pass argument as this (current element) instead of this.id

Try this:

 function countRow(elem) { var trElement = elem.parentElement.parentElement; var tr = document.getElementsByTagName('tr'); tr = Array.prototype.slice.call(tr); alert(tr.indexOf(trElement)); } 

 <table> <tr> <td>111</td> <td>aaa</td> <td> <input type="submit" name="first" id="first" value="First" onclick="countRow(this)" /> </td> </tr> <tr> <td>222</td> <td>bbb</td> <td> <input type="submit" name="sec" id="second" value="Second" onclick="countRow(this)" /> </td> </tr> <tr> <td>333</td> <td>ccc</td> <td> <input type="submit" name="third" id="third" value="Third" onclick="countRow(this)" /> </td> </tr> </table> 

Answer 3

 $('input[type=submit').click(function() { var trid = $(this).closest('tr').attr('id'); // table row ID $('div').text(trid); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> <table> <tr id="row1"> <td>111</td> <td>aaa</td> <td><input type="submit" name="first" id="first" value="First" /></td> </tr> <tr id="row2"> <td>222</td> <td>bbb</td> <td><input type="submit" name="sec" id="second" value="Second" /></td> </tr> <tr id="row3"> <td>333</td> <td>ccc</td> <td><input type="submit" name="third" id="third" value="Third" /></td> </tr> </table> <div id="show" style="color: blue">Show the id of the current clicked row: </div> 

Answer 4

尝试将其用于表格单元格选择器和选定单元格的操作

http://www.redips.net/javascript/table-td-merge-split/

Answer 5

I assume you want to know the id of the <input> element,

<td><input type="submit" name="first" id="first" value="First" onclick="countRow(this.id)" /></td>

so Onclick you want to get 'first' for the above element.

so for this modify the element as this -

<td><input type="submit" name="first" id="first" value="First" onclick="countRow()" /></td>

In JavaScript :

function countRow(){
   // This would give you the id 
    event.target.id
    }