jQuery Grid Plugin - jqGrid

Hi,

In searching you have a default ( predefined in jqgrid language file ) list of search operators, l.e. odata:

['equal','not equal', 'less', 'less or equal','greater','greater or equal', 'begins with','does not begin with','is in','is not in','ends with','does not end with','contains','does not contain']

and correspndent list of aliases declared by sopt option:

['eq','ne','lt','le','gt','ge','bw','bn','in','ni','ew','en','cn','nc']

I've been trying to extend the operators list with, for example, entries like 'on date', 'later', 'earlier' - by playing around with odata and sopt options. No luck though.

Is there any option to do that anyway?

Thanks  a lot.