_getGlobal gets a previously stored variable whose scope will span a session.
Globals are used for persisting variables across multiple web pages.
See also: _setGlobal, Globals
_getGlobal ( name )
Returns the value of the global variable identified by name.
The parameters are:
_setGlobal(“name”, “Narayan”);
_getGlobal(“name”); // will return “Narayan”