How to read datagrid values from javascript

Hi,
Just create datagrid server tag as follows
<aspataGrid ID="MyDataGrid" runat="server"></aspataGrid>

and the JavaScript function to read datagrid is as follows
function readDataGrid()
{
var gridContent = document.getElementById('MyDataGrid');

for(var i=0;i< gridContent.rows.length;i++)
{
for(var j=0;j< gridContent.rows[i].cells.length;j++)
{
This iterates through row\cells
//gridContent.rows[i].cells[j].innerHTML;
}

}
}