asp.net + Code behind send table rows to Javascript

[ChristieM]

I am trying to send some table row data from code behind to process in my Javascript but I get an error in my console: \[code\]Uncaught TypeError: Object <tr><td>usr1</td><td >Z</td><td>40</td></tr><tr><td>usr2</td><td >G</td><td>23</td></tr> has no method 'hide' . \[/code\]Can someone please advise what is the problem? Thanks. Javascript:\[code\] function addRows(rows) { var _rows = $(' ' + rows + ' '); rows.hide(); $('tr:last-child').after(_rows); rows.fadeIn("slow"); }\[/code\]Code Behind:\[code\] foreach (DataRow row in dt.Rows) { rows += string.Format("<tr><td>" + row["UserName"] + "</td><td >" + row["Name"] +"</td><td>" + row["Age"] + "</td></tr>"); } addRows = string.Format("addRows('{0}')", rows); GeneralHelper.RegisterClientScriptBlock(uiupUsr, addRows);\[/code\]