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<!DOCTYPE HTML>
<html>
<head>
<meta charset="gb2312" />
<title></title>
<style>
</style>
</head>
<body>
<button id="btn">add</button>
<div>123</div>
<div>111111</div>
<script>
var $ = function(id){
return document.getElementById(id);
};
$('btn').onclick = function(){
var div = document.createElement('div');
div.innerHTML = Math.random();
document.body.appendChild(div);
}
document.onclick = function(e){
e = window.event || e;
var t = e.target || e.srcElement;
var name = t.tagName.toLowerCase();
if( name == 'div' ){
alert( t.innerHTML );
}
}
</script>
</body>
</html>