A simple application of the custom paging of the GridView in VS2005, radio, multiple selection, sorting and self-adding columns

A simple application of the custom paging of the GridView in VS2005, radio, multiple selection, sorting, and self adding columns.
When you select multiple selections, select multiple selections only when all is selected.

Picture effect:

Simple example, the code is as follows,
Code for Fenpage.aspx:
<% @ Page language= "C #" autoeventwireup= "true" codefile= "Fenpage.aspx.cs" inherits= "Gridview_fenpage"%>

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
< html xmlns = "http://www.w3.org/1999/xhtml" >
< head runat = "server" >
< title ></title >

< SCRIPT language = "javascript" type = "Text/javascript" >
Determines whether multiple selections are selected (returns false without selection)
function Slcno_click ()
{
if (document.form1.checkboxname.length)
{
for (Var i=0;i<document.form1.checkboxname.length;i++)
{
if (document.form1.checkboxname[i].checked)
{
return true;
}
}
}
Else
{
if (document.form1.checkboxname.checked)
{
return true;
}
}
Alert ("Please select a later operation.") ");
return false;
}

The mouse changes the color of the row
if (!objbeforeitem)
{
var objbeforeitem=null;
var objbeforeitembackgroundcolor=null;
}
function