javascript 闭包

<SCRIPT LANGUAGE="JavaScript">
<!--
window.onload = function(){

/**
var test = [];
var list = [1,2,3];
for (var i = 1; i <= list.length; i++) {
(function(i){
test[i] = function(){alert(i)};
})(i);
}
test[1]();

*/

/**
function buildList(list) {
var result = [];
for (var i = 1; i <= list.length; i++) {
result[i] = function() {alert(i)};
}
alert("i:"+i);
return result;
}
var test = buildList([1,2,3]);
test[1]();
**/

    function test(){
var fun = function(){alert(num)};
var chang = function(){++num;};

var num = 2;
num++;
return {fun:fun,chang:chang};
}
var funs = test();
funs.fun();
funs.chang();
test().fun();
test().chang();
funs.fun();

}
//-->
</SCRIPT>