print all variables defined javascript

1var n, arg, name;
2alert("typeof this = " + typeof this);
3for (name in this) {
4    alert("this[" + name + "]=" + this[name]);
5}
6for (n = 0; n < arguments.length; ++n) {
7    arg = arguments[n];
8    alert("typeof arguments[" + n + "] = " + typeof arg);
9    for (name in arg) {
10        alert("arguments[" + n + "][" + name + "]=" + arg[name]);
11    }
12}