The HTML specification does not give an HTML element for a 3D table. There are, however, several ways of designing a 3D table. Last week's article showed you my own way of doing so. I strongly advise you to read that one first, before you read this one, which will go into greater detail and show you how to manipulate a 3D HTML table.
Using a 3D HTML Table as a Recordset - Code Explanation (Page 4 of 4 )
We have a recordset that has a 3D table of three horizontal planes and three vertical planes.
Now, click the "Next Vertical Plane" button repeatedly and you should see the contents of the different vertical planes.
Click the "Give No. of H and V Planes" button. A first alert box will give the number of horizontal planes. When you click its OK button, the second will appear, giving the number of vertical planes. Click its OK button to send it away.
Click the "Modify Row" button. The contents of the row in the middle vertical plane will be changed to the content of an array. You may have to use the "Next Vertical Plane" button to scroll inward and confirm that it has truly changed.
Refresh the page to reset the data. This is for convenience.
Click the "Modify H Plane" button. All of the rows of the middle horizontal plane will have the same content. Use the "Next Vertical Plane" button to confirm this.
Refresh the page to reset the data. This is for convenience.
Click the "Delete Row" button. The contents of the middle row in the second vertical plane will all be erased. Use the "Next Vertical Plane" button to confirm this.
Refresh the page to reset the data. This is for convenience.
Click the "Delete V Plane" button. The contents of the second vertical plane will all be erased. Use the "Next Vertical Plane" button to confirm this.
The Code
The recordset is a 3D HTML table element.
Inspect the way I wrote the code for the table and also note the way I gave the IDs for the table element.
The fundamental statement for the JavaScript code is
document.getElementById(TID).rows[0].cells[k].
This returns a reference to a cell in the one-row table whose id is TID. Recall that each of these one-row tables has only one row. Therefore, to access the row you need only the index 0. A particular cell in the row is accessed with the index variable k.
In a function loop, different values of TID have to be formed in order to access the different tables and their cells.
If you have read the article titled "Building a 3D HTML Table" that I wrote, the complete code should be self-explanatory.
Conclusion
My browser did not allow me to meet the minimum requirements of a recordset. However you can still do a lot with what today's browsers permit. All browsers today will allow you have a good 3D read-only recordset and some features for writing to them.
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Comparing Subtotals Using a 3D HTML Recordset
