Display:Block not working in Chrome or Safari

I have a simple need to display the cells of a table row vertically. This works just fine in FF, but not in Chrome or Safari on the Ipad.

The example below renders as expected in FF, with each row cell under each other, but in Chrome, it seems to ignore the display:block altogether.

What is the issue - or is there a better way to do this.

(The reason for wanting this is that im using @media in the CSS to render the table differently for a small screen)

for a more visual example:

A normal table might be

DATA1 | DATA2 | DATA3

but with display:block, it should be

DATA1
DATA2
DATA3

Many Thanks

<html>
<head>
<style>
    table,
    thead,
    tr,
    td
    {
        display:block;
    }
    table,tr
    {
        border : 1px dotted red;
    }
    td
    {
        border:1px dashed blue;
    }
    thead
    {
        display:none;
    }
</style>
</head>
<body>

<table>
<thead>
<tr>
    <td>Heading 1</td>
    <td>Heading 2</td>
    <td>Heading 3</td>
</tr>
</thead>
<tbody>
<tr>
    <td>Data 1</td>
    <td>Data 2</td>
    <td>Data 3</td>
</tr>
<tr>
    <td>Data 1</td>
    <td>Data 2</td>
    <td>Data 3</td>
</tr>
<tr>
    <td>Data 1</td>
    <td>Data 2</td>
    <td>Data 3</td>
</tr>

</tbody>
</table>

</body>
</html>

Solution

I think I have worked out your problem. Webkit overrides display: block; and computes it to be display: table-cell; in a td when there is no <!DOCTYPE> declared for your html.

To fix this I recommend you set <!DOCTYPE html> before <html> at the top of your html.

The reason the jsfiddle will work is because the site has a <!DOCTYPE> already declared.