webform1.aspx
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm1.aspx.vb" Inherits="JavascriptStudy.WebForm1"%>
<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm1.aspx.vb" Inherits="JavascriptStudy.WebForm1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm1</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="Visual Basic .NET 7.1" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
<script language="javascript" type="text/javascript" src="./01.js"></script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:checkbox id="CheckBox0" style="Z-INDEX: 101; LEFT: 16px; POSITION: absolute; TOP: 24px" runat="server"
p="x" ToolTip="x"></asp:checkbox><asp:checkbox id="CheckBox1" style="Z-INDEX: 102; LEFT: 16px; POSITION: absolute; TOP: 48px" runat="server"
p="x" ToolTip="x"></asp:checkbox><INPUT id="Button1" style="Z-INDEX: 103; LEFT: 16px; POSITION: absolute; TOP: 96px" type="button"
value="SelectAll"><INPUT style="Z-INDEX: 104; LEFT: 96px; POSITION: absolute; TOP: 96px" type="button" value="ClearAll"
id="Button2"></form>
</body>
</HTML>
01.js
window.onload=initAll;
function checkAll()
{
var el=document.getElementsByTagName("span");
for (var i=0;i<el.length;i++)
{
if (el[i].p=="x")
{
if (el[i].getElementsByTagName("input")[0].getAttribute("type")=="checkbox")
{
el[i].getElementsByTagName("input")[0].setAttribute("checked",true);
}
}
}
}
function clearAll()
{
var el=document.getElementsByTagName("span");
for (var i=0;i<el.length;i++)
{
if (el[i].p=="x")
{
if (el[i].getElementsByTagName("input")[0].getAttribute("type")=="checkbox")
{
el[i].getElementsByTagName("input")[0].setAttribute("checked",false);
}
}
}
}
function initAll()
{
document.getElementById("Button1").onclick=checkAll;
document.getElementById("Button2").onclick=clearAll;
}
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