Float a DIV toward bottom-right using CSS

First at all, you must set parent of #trt to relative.

#parent-of-trt  {
   position: relative;
}

And set #trt to absolute

#trt {
   position: absolute;
   left: 4px;
   bottom: 5px;
}

set col-cnt div to position: relative set trt to position: absolute; bottom:3px; right:3px; that should get you where you need to be.. also, trt should be a class if it is being reused