为什么弹出新的页面而没有在框架中显示？target= '框架的ID '，我用的vs2005,代码如下： <%@ Page Language= "C# " AutoEventWireup= "true " CodeFile= "main.aspx.cs " Inherits= "main_main " %>
<!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 ">
<link href= "../CSS/main.css " rel= "stylesheet " type= "text/css " />
<title> 无标题页 </title>
</head>
<body>
<form id= "form1 " runat= "server ">
<div id= "header ">
</div> <div id= "navigation ">
<ul id= "nvi_ul " >
<li> <img class = "img " src = "../images/com/index-anliu1_01.gif " alt= " " /> </li>
<li> <img class = "img " src = "../images/com/index-anliu1_03.gif " alt= " " /> </li>
<li> <img class = "img " src = "../images/com/index-anliu1_03.gif " alt= " " /> </li>
<li> <img class = "img " src = "../images/com/index-anliu1_04.gif " alt= " " /> </li>
<li> <img class = "img " src = "../images/com/index-anliu1_05.gif " alt= " " /> </li>
<li> <img class = "img " src = "../images/com/index-anliu1_06.gif " alt= " " /> </li>
<li> <img class = "img " src = "../images/com/index-anliu1_07.gif " alt= " " /> </li>
<li> <img class = "img " src = "../images/com/index-anliu1_08.gif " alt= " " /> </li>