Column order reversed when adding rows to a dynamic table

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dschectman@yahoo.com - 23 Jan 2006 18:03 GMT

This appears to be a feature of IE JavaScript. I am running IE 6.0
with the latest patches from Microsoft. Are there any workarounds
other than re-coding the source HTML to place all the non-visible
columns at the front?

I have a page with a dynamic table. The table has some visible columns
and some non-visible columns. The style "hide" is .hide {
display:none; }

<table id="SelectedList">
<tr class="columnheader">
<td>Value</td>
<td class="hide">Code</td>
<td class="hide">Type</td>
</tr>
</table>

When I add rows to this table, the order of the columns depends on
whether the hidden columns are at the beginning or end of the row.
Here is the resulting HTML for the table. Note how in the second case,
the order of the last two columns is reversed even though the function
adds them in order: column1, column2, column3.

<TBODY>
<TR class=columnheader>
<TD class=hide>Code</TD>
<TD class=hide>Type</TD>
<TD class="">Value</TD></TR>
<TR>
<TD class=hide>column1</TD>
<TD class=hide>column2</TD>
<TD>column3</TD></TR>
<TR>
<TD>column1</TD>
<TD class=hide>column3</TD>
<TD class=hide>column2</TD></TR></TBODY>

addItem('SelectedList');
function addItem(gridID)
{
var grid = document.getElementById(gridID);

// Test #1: first two columns hidden, las column visible
var row1 = grid.insertRow(grid.rows.length);
for (i=0;i<3;i++)
{
cell = row1.insertCell(i);

if (i==0) cell.innerHTML = "column1"; //document.test.code.value;
else if (i==1) cell.innerHTML = "column2";
//document.test.categ.value;
else cell.innerHTML = "column3"; //document.test.val.value;

if (i!=2) cell.className = "hide";
}

// Test #2: first column visible, last two hidden
var row2 = grid.insertRow(grid.rows.length);
for (i=0;i<3;i++)
{
cell = row2.insertCell(i);

if (i==0) cell.innerHTML = "column1"; //document.test.code.value;
else if (i==1) cell.innerHTML = "column2";
//document.test.categ.value;
else cell.innerHTML = "column3"; //document.test.val.value;

if (i!=0) cell.className = "hide";
}

//document.test.tblhtml.value = grid.innerHTML;
alert(grid.innerHTML);
}

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RobG - 23 Jan 2006 23:22 GMT

> This appears to be a feature of IE JavaScript. I am running IE 6.0
> with the latest patches from Microsoft. Are there any workarounds
[quoted text clipped - 18 lines]
> the order of the last two columns is reversed even though the function
> adds them in order: column1, column2, column3.

Yup, same result here. You can fix two ways: add the cells in one loop,
then hide them using a separate loop, or use createElement and add them
that way (see below):

> <TBODY>
> <TR class=columnheader>
[quoted text clipped - 25 lines]
> //document.test.categ.value;
> else cell.innerHTML = "column3"; //document.test.val.value;

The whole if..else bit can be replaced with:

cell.appendChild(document.createTextNode("column" + (i+1)));

> if (i!=2) cell.className = "hide";
> }
>
> // Test #2: first column visible, last two hidden
> var row2 = grid.insertRow(grid.rows.length);

Replace from here:

> for (i=0;i<3;i++)
> {
[quoted text clipped - 6 lines]
> if (i!=0) cell.className = "hide";
> }

to here with either the following createElement solution:

for (var i=0; i<3; i++)
{
cell = document.createElement('td');
cell.appendChild(document.createTextNode("column" + (i+1)));
row2.appendChild(cell);
if (i!=0) cell.className = "hide";
}

Or this 2 loop solution:

for (var i=0; i<3; i++)
{
cell = row2.insertCell(i);
cell.appendChild(document.createTextNode("column" + (i+1)));
}

for (var j=1, len=row2.length; j<len ; ++j){
row2.cells[j].className = "hide";
}

> //document.test.tblhtml.value = grid.innerHTML;
> alert(grid.innerHTML);
> }

Signature

Rob

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dschectman@yahoo.com - 31 Jan 2006 19:10 GMT

Thanks for the tip.

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Webmaster Forum / HTML, CSS, Scripts / JavaScript / January 2006

Column order reversed when adding rows to a dynamic table