Wraps two functions together into a new function that calls both. Both functions receive the same arguments, but the original function's output is always returned.

xtag.wrap(ORIGINAL, NEW)

ORIGINALFunctionThis function is called first within the wrapper function, and its output is always the returned value.
NEWFunctionThis function is the second one called within the wrapped function, it receives the same arguments as the original.
var foo = function(){ alert(1); return 1 };
var bar = function(){ alert(2); return 2 };

var fooBar = xtag.wrap(foo, bar);

fooBar(); // alerts '1', then '2', returns the value 2