时间：2021-07-01 10:21:17 帮助过：32人阅读
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script type="text/javascript">
function util(){
var elm=function(){
return document.getElementById("testdiv");
}
var createtxt=function(){
var textnode=document.createTextNode("测试！");
var divnode=document.createElement("div");
divnode.appendChild(textnode);
return divnode;
}
this.process=function(){
elm().appendChild(createtxt());
}
}
var c=new util();
setInterval("c.process()",2000);
</script>
</head>
<body>
<div id="testdiv"></div>
</body>
</html>