jQuery Grid Plugin - jqGrid

I apologize for all the questions.

I am using the multisearch toolbar in a way identical to the demo.  When I close the toolbar (by clicking on "Search" again, I'd like the search results to be cleared and all items to be displayed.

I've tried the following where the onClickButton toggles the visibility of the search bar:

jQuery("#t_list").css("display","none"); // original code

jQuery("table.filtertable td > input").val(""); // these lines added
jQuery("#sg_status").val("All");
jQuery("#t_list").filterGrid("list", {gridModel:true, filterModel:false}).triggerSearch();

...and while this clears all results from the search boxes, the request it sends to the server still contains the previous search query.  Using .clearSearch() doesn't seem to do anything either.  Any hints as to how to make a blank query (or query of "_search=false") be sent to the server so that I can have all items re-appear?

Thanks in advance,

Robert