js精髓啊

<input type="button" value="ddd"><input type="button" value="ddd"><input type="button" value="ddd"><script>var nodes = document.getElementsByTagName("input");    var i;    for (i = 0; i < nodes.length; i += 1) {        nodes[i].onclick = function (i) {return function (){alert(i);}        }(i);    }</script>