Me-thinks your code is making an array of custom objects not TR elements. Each object in your array has a .row property which does refer to a TR element, so $(row.row).addClass("bold") might work.
That said, I'd be more inclined to use jQuery to do the work... For example: (Note I've used a $ prefix on variables to help indicate those that are jQuery objects) var $columnCells = $("#srTable>TBODY>TR>TD:nth-child(1)"); Then to loop through them: $columnCells.each(function(){ // Or $columnCells.parent("TR").each... if( -whatever- ){ $(this).parent("TR").addClass("bold"); } }) Hope this helps. George > The problem is later when I'm trying to add or remove class in jquery > fashion like $(row).addClass("bg_litegray") its giving some error. I think > I'm doing it wrong. Can anyone of you suggest me how to use this row > similar to $("#srTable tbody tr") in jquery so that I can add class, remove > class, apply filter like $(row).filter('[EMAIL PROTECTED]"refine"]')....etc...