% Purpose
%    gets the global attribute value.
%
% Synopsis
%    attval = mexeps('getattval',attname)
%
% Description
%    It returns the name of the ith global attritube.  
%
% Examples
%    Get the first attribute value.
%
%      attname = mexeps('attname',1);       % get its name first
%      attval = mexeps('getattval',attname);  % get its value
%
% See Also
%    getattnum, attname, putattval, delatt
%