body {
margin:0px;
padding:0px;
/*background-image:url(../imagens/grad_fundo.jpg);*/
background-color:#EFF7EA;
background-position:top;
background-repeat:repeat-x;
}


#mydiv {
position:absolute;
top: 50%;
left: 50%;
width:453px;
height:336px;
margin-top: -168px; /*set to a negative number 1/2 of your height*/
margin-left: -226px; /*set to a negative number 1/2 of your width*/
text-align: center;
}

.aviso{
	font-size:10px;
	color:#F00;
	font-family:Arial, Helvetica, sans-serif;
	font:Arial, Helvetica, sans-serif;
	}
	
.avisonegrito{
	font-size:11px;
	font-weight:bold;
	color:#F00;
	font-family:Arial, Helvetica, sans-serif;
	font:Arial, Helvetica, sans-serif;
	}