indexOf function JavaScript arrays & IE6/7

Here is a hidden gem : Javascript in IE6 & IE7 DOESNT support Array.indexOf function

So if you are getting some "unknown property or method", open the script debugger (a joke for itself :)) and it hangs on a line with call to indexOf dont despare here is the fix (even better joke that is comes from Mozilla :)

add Array.indexOf for IE6 & IE7