$(function() {
    var highestColHeight = Math.max($('#left-col').height(),$('#mid-col').height(), $('#right-col').height());
    $('#left-col, #mid-col, #right-col').each(function(){
    	$thiscol = $(this);
    	if($thiscol.height() < highestColHeight) {
    		$lastcolbox = $thiscol.find('div.content-box:last .content-box-inner-top:last');
    		heightToAdd = highestColHeight - $thiscol.height();
    		$lastcolbox.height($lastcolbox.height() + heightToAdd);
    	}
    });
});