just copy the code in ur .aspx
1> javscript function
<script language ="javascript" >
function check_uncheck(Val)
{
var ValChecked = Val.checked;
var ValId = Val.id;
var frm = document.forms[0];
// Loop through all elements
for (i = 0; i < frm.length; i++)
{
// Look for Header Template's Checkbox
//As we have not other control other than checkbox we just check following statement
if (this != null)
{
if (ValId.indexOf('CheckAll') != - 1)
{
// Check if main checkbox is checked,
// then select or deselect datagrid checkboxes
if (ValChecked)
frm.elements[i].checked = true;
else
frm.elements[i].checked = false;
}
else if (ValId.indexOf('deleteRec') != - 1)
{
// Check if any of the checkboxes are not checked, and then uncheck top select all checkbox
if (frm.elements[i].checked == false)
frm.elements[1].checked = false;
}
} // if
} // for
} // function</PRE>
function confirmMsg(frm)
{
// loop through all elements
for (i = 0; i < frm.length; i++)
{
// Look for our checkboxes only
if (frm.elements[i].name.indexOf("deleteRec") != - 1)
{
// If any are checked then confirm alert, otherwise nothing happens
if (frm.elements[i].checked)
return confirm('Are you sure you want to delete your selection(s)?')
}
}
}
<script>
2> grid view event
<asp:GridView ID="GridView1" datakeyname="Id" runat="server" DataSourceID="SqlDataSource1" AutoGenerateColumns="False" DataKeyNames="Id" Font-Names="Verdana" AllowPaging="True" BackColor="White" BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px" CellPadding="3" ForeColor="Black" GridLines="Vertical" Width="758px">
<Columns>
<asp:TemplateField>
<HeaderTemplate>
<asp:CheckBox ID="CheckAll" onclick="return check_uncheck (this );" runat="server" />
</HeaderTemplate>
<ItemTemplate>
<asp:Label ID="Id" Visible="false"
Text='<%# DataBinder.Eval (Container.DataItem, "Id") %>'
runat="server" />
<asp:CheckBox ID="deleteRec" onclick="return check_uncheck (this );"
runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Name" HeaderText="ManagerName" SortExpression="Name" />
<asp:BoundField DataField="pone" HeaderText="phone" SortExpression="pone" />
<asp:BoundField DataField="emailid" HeaderText="emailAddress" SortExpression="emailid" />
<asp:BoundField DataField="ManagPass" HeaderText="ManagerPassword" SortExpression="ManagPass" />
<asp:BoundField DataField="Designation" HeaderText="Designation" SortExpression="Designation" />
<asp:BoundField DataField="Id" HeaderText="Id" InsertVisible="False" ReadOnly="True"
SortExpression="Id" />
</Columns>
<FooterStyle BackColor="#CCCCCC" />
<SelectedRowStyle BackColor="#000099" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
<HeaderStyle BackColor="Black" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="#CCCCCC" />
</asp:GridView>
3> button event
asp:Button ID="Button1" runat="server" OnClientClick="return confirmMsg(this.form)"
Text="Delete" OnClick="Button1_Click" Width="50px" /
Unsolved 
