How can I trigger the jqGrid loading.. message?

I'm intercepting server response via datatype, but I've noticed that the l开发者_运维知识库oading.. message is lacking! How can I trigger it ?

$(".loading").css("display", "block");

Then, to hide it after the data loads, you can use:

$(".loading").css("display", "none");

A better way would be using the following code.

$("#lui_gridName,#load_gridName").show();

"gridName" is the name of the grid.