list.jsp页面点XXX字就用window.showModalDialog弹出一个页面a.html里有个提交表单，提交以后，在后台action处理,新页面上有个返回，点返回还能出现index.jsp这个怎么实现呢？
1.index.jsp<org!init.action>
</head>
<frameset cols="20%,*" frameborder="no" border="0" framespacing="0">
<frame src="org!orgTree.action" name="orgTreeFrame" scrolling="no" noresize="noresize" id="orgTreeFrame" /><struts里对应tree.jsp>
<frame src="org!orgList.action" name="orgListFrame" id="orgListFrame" /><struts里对应list.jsp>
</frameset>
2.
public String orgTree()
{
return "orgTree";
}
public String orgList()
{
return "orgList";
}
3.list.jsp
var urls="org!toAdd.action?"+str;
var loc_x = (window.screen.width-300)/2; //获得窗口的垂直位置;
var loc_y = (window.screen.height-300)/2; //获得窗口的水平位置;
var width=450;
var height=300;
var re=window.showModalDialog(urls,parent,"edge:raised;scroll:1;status:0;help:0;resizable:1;dialogWidth:"+width+"px;dialogHeight:"+height+"px;dialogTop:"+loc_y+"px;dialogLeft:"+loc_x+"px",true);
public String toAdd()
{
return "toAdd";
}
4.add.jsp
function add()
{
var fom=document.forms.addForm;
fom.action="org!add.action";
fom.target="orgListFrame";
fom.submit();
window.close();
}
5.
<package name="org" extends="struts-default" namespace="/">
<action name="org!*" method="{1}"
class="com.ssh.action.OrganizationAction">
<result name="init">index.jsp</result>
<result name="orgTree">.jsp</result>
<result name="orgList">.jsp</result>
<result name="toAdd">jsp/system/org/addorg.jsp</result>
</action>
</package>
public String add()
{
try {
response.sendRedirect("org!orgList.action");
} catch (IOException e) {
e.printStackTrace();
}
return null;
}