Me aparece directamente con color :/
<style>
.loginbox {
background-color:#FFFFFF;
width:250;
height:70;
top:-10;
right:10;
position:absolute;
border-radius:10px;
-ms-border-radius:10px;
-moz-border-radius:10px;
-webkit-border-radius:10px;
-khtml-border-radius:10px;
padding:5;
color:#597aa6;
}
</style>
<script>
function aparecer() {
for (i = 0; i <=100; i++)
setTimeout("document.getElementById('loginbox').st yle.opacity = " + i, (10 * i));
}
</script>
<body onload="aparecer()">
<div id="loginbox" style="filter:alpha(opacity=60);-moz-opacity:.60;opacity:.60" class="loginbox">aa</div>