why suggest the hard way?
To align a table to stay at the top or whichever (I know this as I use such layouts all the time), add this to your <td> tag.
valign="top"
That tells it to vertically align your table to sit at the 'top" always, thus it won't be in the middle or the bottom (unless you change "top" to middle or bottom).
Since you using dreamweaver, just click the mouse inside the td that the table you want to be at the top is in, and then select Vert > Top in the properties area. Here is the picture to further guide you.
