Reading datagrid values using Javascript

JavaScript function:

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;
}
}
}