.grilla {
    background-color: #fff; 
    margin: 5px 0 10px 0; 
    border: solid 1px black; 
    border-collapse:collapse; 
}
.grilla td { 
    padding: 2px; 
    border: solid 1px black; 
	color: #717171; 
    text-align:center;
}
.grilla th { 
    padding: 4px 2px;
	background-color: #fe6565; 
    border-left: solid 1px #525252; 
    font-size: 1 em;
    color: #fff;  
}

tr:nth-child(odd)		{ background-color:#eee; }
tr:nth-child(even)		{ background-color:#fff; }