[jQuery] Align to bottom (Div)

[jQuery] Align to bottom (Div)


Trying to figure out a solid efficient algorithm for aligning objects
to the bottom. The div is a column and the height is dynamic because
the contents of the right column changes. (see below)
so say the markup for the image is this:
<div id="container">
<div id="col-left" class="alignstupidbottom">
<img src="blahblah.gif" />
</div>
<div id="col-right">

contents


</div>
</div>
so in order to align say an image to the bottom you have to do this:
1. find the height of the container
2. find the height of the image
3. subtract height of container - height of image
4. set the position of the image with margin top.
correct? Is there a more efficient way?