JS字体闪烁

<div id="reward" class="songmai">网上下订,即送200</div>

<script language="JavaScript1.1" type="text/javascript">
if (navigator.appName.indexOf('Netscape') == '-1')
{
var colors = ["666666","ff6600"];
var nextcolor = 0;

function changecolor()
{
document.all.reward.style.color = colors[nextcolor++];
nextcolor = nextcolor % colors.length;
}
//document.all.reward.style.fontFamily = "Arial";
//document.all.reward.style.fontSize = "10pt";
setInterval("changecolor()", 200);
}
</script>