模态窗口间传递多个值

在web应用中,如何以模态窗口方式新打开子窗口,并往子窗口里传递多个值,而在子窗口中,能接受这些值,并且对这些值修改后,可以再提交传递给父窗口呢?在codeproject上,有篇文章介绍了方法,下面介绍如下:
1 先建一个叫ParentWebForm的父窗口,写入其中的HTML代码如下:
  
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
    <HEAD>
        <title>Parent Webform</title>
        <script language="javascript">
function OpenChild() 
{
    var ParmA = retvalA.value;
    var ParmB = retvalB.value;
    var ParmC = retvalC.value;
    var MyArgs = new Array(ParmA, ParmB, ParmC);
    var WinSettings = "center:yes;resizable:no;dialogHeight:300px"
    //ALTER BELOW LINE - supply correct URL for Child Form
    var MyArgs = window.showModalDialog(
   "http://localhost/ModalWin/ChildWebForm.aspx", MyArgs, WinSettings);
    if (MyArgs == null)
    {
        window.alert(
          "Nothing returned from child. No changes made to input boxes")
    }
    else
    {
        retvalA.value=MyArgs[0].toString();
        retvalB.value=MyArgs[1].toString();
        retvalC.value=MyArgs[2].toString();
    }
}
        </script>
    </HEAD>
    <body>
        <P><INPUT id="retvalA" type="text" value="AAA"></P>
        <P><INPUT id="retvalB" type="text" value="BBB"></P>
        <P><INPUT id="retvalC" type="text" value="CCC"></P>
        <P><BUTTON onclick="OpenChild()" type="button">
                Open Child Window</BUTTON>
        </P>
    </body>
</HTML>

2 建立一个叫ChildWebform 的窗体,写入HTML代码如下
  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
    <HEAD>
        <TITLE>Child Webform</TITLE>
        <script language="javascript">
function Done() {
    var ParmA = tbParamA.value;
    var ParmB = tbParamB.value;
    var ParmC = tbParamC.value;
    var MyArgs = new Array(ParmA, ParmB, ParmC);
    window.returnValue = MyArgs;
    window.close();
}
function doInit() {
    var ParmA = "Aparm";
    var ParmB = "Bparm";
    var ParmC = "Cparm";
    var MyArgs = new Array(ParmA, ParmB, ParmC);
    MyArgs =  window.dialogArguments;
    tbParamA.value = MyArgs[0].toString();
    tbParamB.value = MyArgs[1].toString();
    tbParamC.value = MyArgs[2].toString();
}
        </script>
    </HEAD>
    <BODY onload="doInit()">
        <P>Param A:<INPUT id="tbParamA" TYPE="text"></P>
        <P>Param B:<INPUT ID="tbParamB" TYPE="text"></P>
        <P>Param C:<INPUT ID="tbParamC" TYPE="text"></P>
        <BUTTON onclick="Done()" type="button">OK</BUTTON>
    </BODY>
</HTML>

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