求助：关于控件隐藏与显示 - 编程论坛

#2

botailang2007-07-08 11:06

没人看吗
自己顶一下！

#3

川流不息2007-07-09 09:18

onFocus="show()" onBlur="asd()" 這兩個方法有沒有執行？你在裡面寫一個alert('aaa');試試，看能不能彈出一個窗口。

#4

botailang2007-07-09 10:16

事件执行了
输出了“aaa”

#5

冰彩虹2007-07-09 12:41

页面加载时<asp:Button id="Button1" style="Z-INDEX: 102; LEFT: 472px; POSITION: absolute; TOP: 120px" runat="server" Text="Button" Visible="False"></asp:Button>这个按钮在客户端是没有代码的，所以document.getElementById("Button1")根本就找不到对象的吧

#6

冰彩虹2007-07-09 12:48

function show()
{
document.getElementById("Button1").style.visibility="visible";
}
function asd()
{
document.getElementById("Button1").style.visibility= "hidden";
}

<asp:Button id="Button1" style="Z-INDEX: 102; LEFT: 472px; POSITION: absolute; TOP: 120px" runat="server"
Text="Button" style="visibility:hidden"></asp:Button>

试试看

#7

botailang2007-07-09 16:26

[QUOTE] function show()
{
document.getElementById("Button1").style.visibility="visible";
}
function asd()
{
document.getElementById("Button1").style.visibility= "hidden";
}
<asp:Button id="Button1" style="Z-INDEX: 102; LEFT: 472px; POSITION: absolute; TOP: 120px" runat="server"
Text="Button" style="visibility:hidden"></asp:Button>[/QUOTE]

button的代码里怎么会有两个style呢
去掉第一个style,运行时提示缺少对象,光标指示在document.getElementById("Button1").style.visibility="visible";

#8

川流不息2007-07-09 17:18

你把你的javascript語句寫在最後吧，等所有控件加載完後再運行你的javascript

document.all.Button1.style.display="none";

#9

botailang2007-07-09 17:24

可以实现了
但为什么要写在最后呢

#10

sean882007-07-09 17:34

因为第一次页面加载的时候,你的Button1的visible=false,你查看一下源文件,html根本没加载Button1,所以当你调用javascript的方法时找不到Button1

[此贴子已经被作者于2007-7-9 17:36:08编辑过]

#11

botailang2007-07-10 09:05

了解了！
谢谢各位！
以下是实现功能的具体代码:
<%@ Page language="c#" Codebehind="1.aspx.cs" AutoEventWireup="false" Inherits="CalendarTest._1" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>shiyan</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<asp:TextBox id="TextBox1" onFocus="show()" onBlur="asd()" style="Z-INDEX: 101; LEFT: 272px; POSITION: absolute; TOP: 120px"
runat="server"></asp:TextBox>
<asp:Button id="Button1" runat="server"
Text="Button" style="visibility:hidden"></asp:Button>
</form>
</body>
<script language="javascript">
function show()
{
document.getElementById("Button1").style.visibility="visible";
}
function asd()
{
document.getElementById("Button1").style.visibility= "hidden";
}
</script>
</HTML>