[html] How to completely remove borders from HTML table

My goal is to make an HTML page that is similar to a "photo frame". In other words, I want to make a blank page that is surrounded by 4 pictures.

This is my code:

<table>
    <tr>
        <td class="bTop" colspan="3">
        </td>
    </tr>
    <tr>
        <td class="bLeft">
        </td>
        <td class="middle">
        </td>
        <td class="bRight">
        </td>
    </tr>
    <tr>
        <td class="bBottom" colspan="3">
        </td>
    </tr>                                                    
</table>

And the CSS classes are the following:

.bTop
{
    width: 960px;
    height: 111px;
    background-image: url('../Images/BackTop.jpg');
}
.bLeft
{
    width: 212px;
    height: 280px;
    background-image: url('../Images/BackLeft.jpg');    

}

.middle
{
    width: 536px;
    height: 280px;
}

.bRight
{
    width: 212px;
    height: 280px;
    background-image: url('../Images/BackRight.jpg');    
}

.bBottom
{        
    width: 960px;
    height: 111px;
    background-image: url('../Images/BackBottom.jpg');       
}

My problem is that I am getting thin white lines between the cells of the table, I mean that the border of pictures is not continuous. How can I avoid these white spaces?

For me I needed to do something like this to completely remove the borders from the table and all cells. This does not require modifying the HTML at all, which was helpful in my case.

table, tr, td {
    border: none;
}

Using TinyMCE editor, the only way I was able to remove all borders was to use border:hidden in the style like this:

<style>
table, tr {border:hidden;}
td, th {border:hidden;}
</style>

And in the HTML like this:

<table style="border:hidden;"</table>

Cheers

table {
    border-collapse: collapse;
}

In a bootstrap environment here is my solution:

    <table style="border-collapse: collapse; border: none;">
        <tr style="border: none;">
            <td style="border: none;">
            </td>
        </tr>
    </table>    

In a bootstrap environment none of the top answers helped, but applying the following removed all borders:

.noBorder {
    border:none !important;
}

Applied as:

<td class="noBorder">

This is what resolved the problem for me:

In your HTML tr tag, add this:

style="border-collapse: collapse; border: none;"

That removed all the borders that were showing on the table row.