jQuery grid cell comments

Comments can be defined initially for rows and cells in JSON data using pq_rowattr and pq_cellattr in local or remote data
(v7.x) Comments can be defined for header cells with column.attrHead

(v7.x) Range.comment() method can be used for dynamic manipulation of comments as in this example
In earlier versions, attributes can be programmatically manipulated with attr and removeAttr methods as can be seen in examples for old versions

Note: jQuery attr and removeAttr shouldn't be used directly to manipulate attributes because of virtual rendering used in pqGrid.