[pirat89]

Сам отвечаю на свой вопрос:

{msg:"Delete selected row(s)",
			url:"jqgriddelete.php",
			reloadAfterSubmit:false,
			delData: {
			tid: function () {
			var t_row = $('#list').getGridParam('selrow');
			var value = $('#list').getCell(t_row,'tid');
			return value;
			}
			}
	   }