.fadebox {
display: none;
position: fixed;
top: 0%;
left: 0%;
width: 100%;
height: 100%;
background-color: gray;
z-index:1001;
opacity: 0.4;
/* -moz-opacity: 0.4;
filter: alpha(opacity=40);*/
}

.overbox {
display: none;
position: fixed;
padding:0px;
margin:0px;
top: 25%;
left: 30%;
width: 400px;
height: 250px;
z-index:1002;
overflow: auto;
background-image:url(../imagenes/javascript/mensaje.png); 
background-repeat: no-repeat;
background-position: bottom right;
}

.mensajes{
font-size:0.8em;
padding-left:35px;
padding-right:15px;
padding-top:50px;
}

.cerrar_error{
position:absolute;
bottom: 20px;
right:30px;
outline-style:none; 
text-decoration: none;
border:1px solid gray;
}

.cerrar_error:active{
border:1px solid gray;
outline-style:none; 
text-decoration: none;
}

.cerrar_error:focus{
border:1px solid gray;
   text-decoration: none;
outline-style:none; 
}