#content_l{
    text-align: center;
}
#content_l.examen{
    background: url('../img/laboratorio_examenes.jpg') no-repeat;
}
#menu.contacto{
    margin-left: 549px;
}
#menu{
    margin-left: 69px;
}
#btn_01{
    float: left;
    background-image: url('../../img/logo_cmedico_off.jpg');
}
#btn_02{
    float: right;
    background-image: url('../../img/logo_dialisis_off.jpg');
}

#btn_01:hover{
    background-image: url('../../img/logo_cmedico_on.jpg');
}
#btn_02:hover{
    background-image: url('../../img/logo_dialisis_on.jpg');
}

#texto{
    width: 303px;
    text-align: left;
    height: 271px;
    margin-top: 75px;
    margin-left: 82px;
}
#texto2{
    width: 303px;
    text-align: left;
    height: 271px;
    margin-top: 75px;
    margin-left: 24px;
}
#l_btn{
    width: 435px;
    height: 55px;
    text-align: right;
}
#l_btn img{
    cursor:pointer;
}