#mask{  
    position:fixed; /* important */  
    top:0px; /* start from top */  
    left:0px; /* start from left */  
    height:100%; /* cover the whole page */  
    width:100%;  /* cover the whole page */  
    display:none; /* don't show it '*/  
    z-index:1000;
    /* styling bellow */  
    background-color: black;  
}
#metroConf{
		width:100%;
		min-height:100px;
		background-color:black;
		color:white;
		position:fixed;
		top:50%;
		margin-top:-50px;
		left:0px;
		z-index:1001;
		text-align:center;
		display:none; /* don't show it '*/ 
		padding-top:10px;
		padding-bottom:10px;
	 }
#metroConf .msj{
	 color:white;
}