javascript dom追加内容实现示例

代码如下:

<!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>

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