Remove table row by finding content with Javascript

Question

i have this code:

<table>
    <tbody>
        <tr>
            <td align="left">X</td>
            <td>X1</td>     
        </tr>
        <tr>        
            <td width="150" align="left">Y</td>
            <td>Y1</td>
        </tr>
        <tr>    
            <td align="left">Status: </td>
            <td colspan="4">
                <select name="status" size="1">
                    <option selected="selected" value="2">one</option>
                    <option value="1">two</option>
                </select>                   
            </td>
        </tr>
        <tr>        
            <td width="150" align="left">Z</td>
            <td>Z1</td>
        </tr>   
    </tbody>
</table>

and want to remove with Javascript this line:

<tr>    
    <td align="left">Status: </td>
    <td colspan="4">
        <select name="status" size="1">
            <option selected="selected" value="2">one</option>
            <option value="1">two</option>
        </select>                   
    </td>
</tr>

the problem is that i don't have any id's or classes for identification. is there a way to remove the row by searching "Status: " or name="status" with javascript for Firefox only (using it for Greasemonkey)?

i can't use jQuery and i can't edit the code to set any id's

best regards bernte

Answer 1

If you can afford not being compatible with IE7, You can do that :

​var elements = document.querySelectorAll('td[align="left"]');
for (var i=0; i<elements.length; i++) {
    var text = elements[i].textContent || elements[i].innerText;
    if (text.trim()=='Status:') {
       elements[i].parentNode.parentNode.removeChild(elements[i].parentNode);   
    }
}

Demonstration

To be compatible with IE7, you'd probably have to iterate on all rows and cells, which wouldn't really be slower but would be less clear.

Note that I used trim which doesn't exist on IE8. To make it work on this browser if needed, you might add this usual fix (from MDN ) :

if(!String.prototype.trim) {
  String.prototype.trim = function () {
    return this.replace(/^\s+|\s+$/g,'');
  };
}

Answer 2

function removeRowByCellValue(table,cellValue) {
    var cells = table.getElementsByTagName("TD");
    for(var x = 0; x < cells.length; x++) {

        // check if cell has a childNode, prevent errors
        if(!cells[x].firstChild) {
            continue;
        }

        if(cells[x].firstChild.nodeValue == cellValue) {
            var row = cells[x].parentNode;
            row.parentNode.removeChild(row);
            break;
        }
    }
}

First get a reference to your table, since you do not have an ID you can use getElementsByTagName .. (here i'm assuming that it is the first table in your document)

var myTable = document.getElementsByTagName("table")[0];

Then you can invoke the function with the following parameters

removeRowByCellValue(myTable,"Status: ");

Answer 3

var xpathResult = document.evaluate("//td[starts-with(.,'Status:')]", document.body, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
var element = xpathResult.singleNodeValue.parentNode;
while (element.firstChild)
  element.removeChild(element.firstChild);

Jsbin http://jsbin.com/urehuw/1/edit

Answer 4

And if you'd like to be compatible with older IE:

function closest(el, tag) {
    if (!el || !tag) {
        return false;
    }
    else {
        return el.parentNode.tagName.toLowerCase() == tag ? el.parentNode : closest(el.parentNode, tag);
    }
}

// gets all 'select' elements
var sel = document.getElementsByTagName('select');

// iterates through the found 'select' elements
for (var i=0, len = sel.length; i<len; i++) {
    // if the 'select' has the name of 'status'
    if (sel[i].name == 'status') {
        // uses the closest() function to find the ancestor 'tr' element
        var row = closest(sel[i], 'tr');
        // access the 'tr' element's parent to remove the 'tr' child
        row.parentNode.removeChild(row);
    }
}

JS Fiddle demo .

Answer 5

simply use this

    var gettag =document.getElementsByTagName("tr")[3] ; // the third tag of tr
         document.removeChild(gettag);