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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<font id="show" color="blue" size="6"></font>
</body>
<script>
var show = document.getElementById('show');
var str = '今天也是3月1号也就是说一九年已经过去两个月了';
//将字符串添加标签的函数
function pick(i,str){
tmp = str.substr(0,i);
tmp +='<font color="red" size="7">'+str[i]+'</font>';
tmp += str.substr(i+1);
//alert(tmp);
return tmp;
}
var num = 0;
setInterval(function(){
if(num >=str.length){
num = 0;
}
show.innerHTML =pick(num,str);
num++;
},300)
</script>
</html>点击 "运行实例" 按钮查看在线实例
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