body,html         {height:100%;margin:15px;padding:0;background:white}

#page_body        {height:100%}
#page_top         {height:50%;position:relative}
#page_bottom      {height:50%;text-align:right}
#page_bottom div  {margin-top:12px}

.align_bottom     {position:absolute;bottom:0px;right:0}