#body_content
{ 
width:542px;
_margin-left:-271px;
}

#cuerpo{clear: both;}
#imagen1{ margin-bottom:45px;}
#columna1{width: 339px; float:left;}
#columna2{width: 160px; float:right; text-align: right;}

#imgid2{ float:left;  width: 262px; margin-bottom:45px;}
#imgid1{ float:right; width: 262px; margin-bottom:45px;}