Is it possible to iterate through DataGrid Items with JavaScript ?

Whenever any tabular data are displayed on a page, it is possible to iterate through them using JS. However, the exeact implementation depends on where the component came from. Which DataGrid are you using? Something MS created? From JSF? You see the source of the component determines the exact markup that's displayed. If you could paste the generated source of the datagrid, it would help identify what to access.

i get table with TR and TD's like this one.
my Grid has first and last names.

       <table cellspacing="0" cellpadding="3" rules="all" border="1" id="MyDataGrid" style="border-color:Tan;font-family:Arial;font-size:9pt;width:800px;border-collapse:collapse;">
      <tr style="color:White;background-color:#336699;font-weight:bold;">
            <td align="center">Edit</td><td align="center">Delete</td><td><a href="javascript:__doPostBack('MyDataGrid$ctl02$ctl00','')" style="color:White;">id</a></td><td><a href="javascript:__doPostBack('MyDataGrid$ctl02$ctl01','')" style="color:White;">First Name</a></td><td><a href="javascript:__doPostBack('MyDataGrid$ctl02$ctl02','')" style="color:White;">Last Name</a></td><td><a href="javascript:__doPostBack('MyDataGrid$ctl02$ctl03','')" style="color:White;">permission</a></td>
      </tr><tr style="background-color:#EEEEEE;">
            <td align="center" style="width:70px;"><a href="javascript:__doPostBack('MyDataGrid$ctl03$ctl00','')"><img src='gui/icon/application_form_edit.gif' border=0 /></a></td><td align="center" style="width:40px;"><a href="javascript:__doPostBack('MyDataGrid$ctl03$ctl01','')"><img src='gui/icon/application_form_delete.gif' border=0 /></a></td><td valign="top" style="white-space:nowrap;">71</td><td>
            john
          </td><td>
            weis
          </td><td>
            1
          </td>
      </tr><tr style="background-color:#EEEEEE;">
            <td align="center" style="width:70px;"><a href="javascript:__doPostBack('MyDataGrid$ctl04$ctl00','')"><img src='gui/icon/application_form_edit.gif' border=0 /></a></td><td align="center" style="width:40px;"><a href="javascript:__doPostBack('MyDataGrid$ctl04$ctl01','')"><img src='gui/icon/application_form_delete.gif' border=0 /></a></td><td valign="top" style="white-space:nowrap;">60</td><td>
            Dan
          </td><td>
            Kerr
          </td><td>
            1
          </td>
      </tr><tr style="background-color:#EEEEEE;">
            <td align="center" style="width:70px;"><a href="javascript:__doPostBack('MyDataGrid$ctl05$ctl00','')"><img src='gui/icon/application_form_edit.gif' border=0 /></a></td><td align="center" style="width:40px;"><a href="javascript:__doPostBack('MyDataGrid$ctl05$ctl01','')"><img src='gui/icon/application_form_delete.gif' border=0 /></a></td><td valign="top" style="white-space:nowrap;">70</td><td>
            Cristian
          </td><td>
            Luxford
          </td><td>
            2
          </td>
      </tr><tr style="background-color:#EEEEEE;">
            <td align="center" style="width:70px;"><a href="javascript:__doPostBack('MyDataGrid$ctl06$ctl00','')"><img src='gui/icon/application_form_edit.gif' border=0 /></a></td><td align="center" style="width:40px;"><a href="javascript:__doPostBack('MyDataGrid$ctl06$ctl01','')"><img src='gui/icon/application_form_delete.gif' border=0 /></a></td><td valign="top" style="white-space:nowrap;">54</td><td>
            Ben
          </td><td>
            Turner
          </td><td>
            3
          </td>
      </tr><tr align="right" style="background-color:#C6C3C6;font-size:Smaller;">
            <td colspan="6"><span>1</span>&nbsp;<a href="javascript:__doPostBack('MyDataGrid$ctl08$ctl01','')">2</a></td>
      </tr>
</table>

that's great!
thanks