<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="i1">欢迎老男孩莅临指导</div> <script> function func(){ //根据ID获得指定标签的内容 var tag = document.getElementById('i1') var content = tag.innerText; var f = content.charAt(0);//获取第一个字 var l = content.substring(1, content.length);//获取第二个字到最后 var new_content = l + f;//重新组合 tag.innerText = new_content;//重新赋值 } setInterval('func()', 500); //0.5秒重复上述动作 </script> </body> </html>
