How to call gridview button click event in java script

Just add the RowDataBound Event to GridView. and palce the specified code inside.

<asp:gridview id="GridView1" runat="server" allowpaging="True" autogeneratecolumns="False" xmlns:asp="#unknown">
 DataKeyNames="ID" DataSourceID="SqlDataSource1" PageSize="15" AllowSorting="True" OnRowDatabound="GridView1_RowDataBound" OnRowCommand = "GridView1_RowCommand" >

protected void GridView1_RowDataBound(object sender, GridViewRowCommandEventArgs e)
{

 if(e.Row.RowIndex != -1)
 {
  //Here Index of Cell will be the No of Delete Column. 
  LinkButton btn = (LinkButton)e.Row.Cells[1].Controls[1];
  btn.Attributes.Add("onclick","if (confirm('Are you sure to delete this admin user?')){return true} else {return false}");
 }
}
 </asp:gridview>

this code is working in my sample gridview..