closure

Looks Good Works Well

function main(links) {
    for (var i = 0; i < links.length; i++) {
        links[i].onclick = function() {
            alert(i + 1);
        }
    }
};
main(document.getElementsByTagName("a"));

function main(links) {
    for (var i = 0; i < links.length; i++) {
        links[i].onclick = (function(i) {
            return function() {
                alert(i + 1);
            }
        })(i);
    }
};
main(document.getElementsByTagName("a"));