window.onload=function(){setTimeout("changeElements()",3000);//事件是毫秒}function changeElements(){var e
window.onload=function(){ setTimeout("changeElements()",3000);//事件是毫秒 }function changeElements(){ var elem1=document.getElementById("elem1"); var elem2=document.getElementById("elem2"); var temp=elem1.innerHTML; elem1.innerHTML=elem2.innerHTML; elem2.innerHTML=temp; setTimeout("changeElements()",3000);//循环调用 }<html> <head> <meta charset="UTF-8"> <title></title> <script type="text/javascript" src="js/innerHtml.js"></script> </head> <body> <div id="elem1"> <p>paragraph text.</p> </div> <div id="elem2"> <ul> <li>op1</li> <li>op2</li> <li>op3</li> </ul> </div> </body></html>
