<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> </head> <body> <div id="test" style="font-size:100px">abcdefg<br />hijklmn<br />opqrst<br />uvwxyz</div> <script> var color = ["#f00", "#0f0", "#00f", "#000"]; var i = 0; function change(){ var index = i++ % color.length; document.getElementById("test").style.color = color[index]; } setInterval(change, 500); </script> </body> </html>