<!doctype html>
<html>
<head><meta charset="utf-8">
<title>无标题文档</title>
</head>
<script type="text/javascript">
window.onload=function(){
for(var i=1;i<=2;i++){
document.getElementById("b"+i).addEventListener("click",function(){alert(i);},false);
}
}
</script>
<body>
<button id="b1">button1</button> <button id="b2">button2</button>
</body>
</html>
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