Advanced methods offer the ability to dynamically change properties of the colModel. To keep the basic code small, these reside in a separate module (grid.custom.js) that must be installed for these to be available. See Installation

Method	Parameters	Returns	Description
getColProp	colname	an array of the properties of the given column from colModel
GridDestroy	grid_id	true on success, otherwise false	Destroys the entry grid from the DOM (clears all the html associated with the grid and unbinds all events)
GridUnload	grid_id	true on success, otherwise false	The only difference to previous method is that the grid is destroyed, but the table element and pager (if any) are left ready to be used again.
setColProp	colname, properties	jGrid object	Sets new properties in colModel. This method is ideal for dynamically changing properties of the column. Note that some properties - like width and align - have no effect. For example: jQuery("#grid_id").setColProp('colname',{editoptions:{value:"True:False"}}) will change the editoptions values.
sortGrid	colname,reload	jGrid object	Sorts the given colname and shows the appropriate sort image. The same (without sorting image) can be done using setGridParam({sortname:'myname'}).trigger('reloadGrid') If the reload is set to true, the grid reloads with the current page and sortorder settings.