刚刚 看到这么一个问题，这里也做个标记：http://topic.csdn.net/u/20080411/14/7b0f9da5-0413-4149-91e9-72c3df3018a3.html?seed=327251592
第一种方式：
//在Visual Studio 2008中调试通过
testPop_Page.aspx:主页面ASPX代码
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript" >
function Pop()
{
var result = showModalDialog('testPop_downs.aspx', 'subpage', 'dialogWidth:800px;dialogHeight:600px;center:yes;help:no;resizable:yes;status:no'); //打开模态子窗体,并获取返回值
document.getElementById("txt_id").value=result.split("'")[0]; //返回值分别赋值给相关文本框
document.getElementById("txt_name").value=result.split("'")[1];
document.getElementById("txt_pwd").value=result.split("'")[2];
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txt_id" runat="server" ></asp:TextBox>
<asp:TextBox ID="txt_name" runat="server" ></asp:TextBox>
<asp:TextBox ID="txt_pwd" runat="server" ></asp:TextBox>
<br />
<asp:Button ID="btnPop" runat="server" Text="PoPWindows" OnClientClick ="Pop()"
&nbs
