一个关于闭包的问题
<!doctype html>
<title>javascript闭包 by 司徒正美</title>
<meta charset="utf-8"/>
<meta name="keywords" content="javascript闭包 by 司徒正美" />
<meta name="description" content="javascript闭包 by 司徒正美" />
<script type="text/javascript">
window.onload = function(){
for(var i=1; i < 4; i++){
var id = document.getElementById("a" + i);
id.onclick = function(){
alert(i);//现在都是返回4
}
}
}
</script>
<h1>javascript闭包 by 司徒正美</h1>
<ul>
<li id="a1">aa</li>
<li id="a2">aa</li>
<li id="a3">aa</li>
</ul>
window.onload = function(){
for(var i=1; i < 4; i++){
var id = document.getElementById("a" + i);
(function(i){
id.onclick = function(){
alert(i);//现在都是返回4
}
})(i);
}
}
