.formulario{margin-left:5%}
.formulario .fila{height:25px;margin-bottom:4px}
.formulario .izquierda{padding-top:5px;float:left;margin-right:2%;text-align:right;width:30%}
.formulario .derecha{float:left}
.formulario .derecha input[type="image"]{position:relative;top:4px}
.formulario .botonera{margin-top:20px;margin-left:30%}
.formulario .boton{margin-left:10px;margin-right:10px}
.formulario .volver{text-align:right;margin-top:15px}
/* internet explorer */
*html .formulario .volver{margin-top:40px}
*:first-child+html .formulario .volver{margin-top:40px}
*html .formulario{margin-left:2%}
*:first-child+html .formulario{margin-left:2%}