Closing the popup in firefox,IE and all other browsers using java script

function CloseMyPopup(){
win=top;
win.opener=top;
win.Close();
}

Adding a new column to a table with the same data existing in other column of same data table with different datatype..

  //Data table creation DataTable dt = new DataTable();

for (int i = 0; i < 10; i++)

dt.Columns.Add("SNo", typeof(string));

{

DataRow dr = dt.NewRow();

dr["SNo"] = i.ToString();

}

//Adding new column saying serailNo with datatype as int

dt.Columns.Add("SerailNo", typeof(int), "Convert(SNo ,System.Int32)");

//Now you can see a new column saying serialno with datatype int32

Adding S.No column to grid

<asp:TemplateField HeaderText="S.No"><ItemTemplate><%
#Container.DataItemIndexIndex + 1 %></ItemTemplate></asp:TemplateColumn>