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| <!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=utf-8" />
<title>无标题文档</title>
<script>
window.onload = function(){
var btn = document.getElementById('btn');
var ul = document.getElementById('ul');
var isFrag = document.createDocumentFragment();
btn.onclick = function() {
var isStart = new Date().getTime();
for(var i = 0;i < 100000; i++) {
var ali = document.createElement('li');
isFrag.appendChild(ali);
}
ul.appendChild(isFrag);
alert(new Date().getTime() - isStart);
}
}
</script>
</head>
<body>
<input type="button" value="添加" id="btn" />
<ul id="ul"></ul>
</body>
</html>
|