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js 动态创建 html元素

<!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> js学习之动态创建html元素</title> 
<style></style><style bogus="1">body{margin:0;padding:0;} 
.sky{background:#000;width:1000;height:500px; position:relative;} 
#s{ background:#FFF; width:1px; height:1px; overflow:hidden; position:absolute;}</style> 
</head>

<body> 
<div class="sky" id="sky"></div> 
<button id="creatstar" onclick="creatstars()">没事造星星玩</button> 
<img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20type%3D%22text%2Fjavascript%22%3E%3C!--%20%0D%0Afunction%20%24(id)%7B%20return%20document.getElementById(id)%3B%7D%3B%20%0D%0A%0D%0Afunction%20creatstars()%7B%20%0D%0Avar%20star%20%3D%20document.createElement(%22div%22)%3B%20%0D%0Astar.id%20%3D%20%22s%22%3B%20%0D%0Avar%20posX%20%3D%20Math.floor(Math.random(star.style.top)*400%2B100)%3B%20%0D%0Avar%20posY%20%3D%20Math.floor(Math.random(star.style.left)*1000%2B1)%3B%20%0D%0A%24(%22sky%22).appendChild(star)%3B%20%0D%0Astar.style.top%20%3D%20posX%20%2B%20%22px%22%3B%20%0D%0Astar.style.left%20%3D%20posY%20%2B%20%22px%22%3B%20%0D%0A%7D%20%0D%0A%2F%2F%20--%3E%3C%2Fscript%3E"> 
</body> 
</html>

　　 [Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

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