<html>
<head>
<script src="jquery-1.7.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
var t1=setTimeout("$('#a').css('color','#0099FF');",2000)
var t2=setTimeout("$('#b').css('color','#0099FF')",3000)
var t3=setTimeout("$('#c').css('color','#0099FF')",4000)
var t3=setTimeout("$('#d').css('color','#0099FF')",5000)
})
</script>

<style>
span{font-weight:bold;font-size:50px;color:#ccc}
</style>
</head>

<body>
	<span id="a">www.</span>
	<span id="b">51</span>
	<span id="c">cto</span>
	<span id="d">.com</span>
</body>
</html>


自动换颜色