高手帮忙看下我的JavaScript代码

<html>
<head>
<script type="text/javascript"> var demo=new Array();
demo[0]="red";
demo[1]="blue";
demo[2]="green";
var index=0; function showTime()
{
var x=new Date().toLocaleString();
myTime.innerHTML=x;
if(index>=demo.length)
{
index=0;

}
document.getElementById("myTime").color=demo[index];
index++;
setInterval("showTime()",1000);

}

</script>
</head>
<body>
<input type="button" value="显示时间" onclick="showTime()" /><br/><br/>
<font id="myTime"></font>
</body>
</html>