<!DOCTYPE html>
<html>
<body>
<script type="text/javascript">
var data=new Array();
data.push(0);
data.push(1);
data.push(2);
data.forEach(function(val,index,ary){
console.log(ary[index]); // 0,1,2と順番に表示される
});
</script>
</body>
</html>