How good your JS?

test.js

function addLinks () {
	for (var i=0, link; i<5; i++) {
		link = document.createElement("a");
		link.innerHTML = "Link " + i;
		link.onclick = function () {
			alert(i);
		};
		document.body.appendChild(link);
	}
}

// expect: alert according to i
// actual: alert 5
window.onload = addLinks;